Daily Current Affairs MCQ: 17th July 2025 - UPSC MCQ

1. Statement 1 is correct. The LHCb experiment at CERN has indeed observed CP violation in the decay patterns of Lambda-b baryons, which is significant as it is the first observation of such a phenomenon in heavier particles. CP violation is crucial in explaining the matter-antimatter asymmetry in the universe.

2. Statement 2 is correct. The Javelin missile is equipped with "fire-and-forget" technology. This advanced guidance system allows the missile to autonomously guide itself to the target after launch, enabling the operator to immediately relocate or prepare for subsequent engagements.

3. Statement 3 is incorrect. Contrary to the statement, the Supreme Court of India has ruled that secretly recorded spousal conversations can be admissible as evidence in matrimonial disputes, provided they are relevant and verifiable. This reflects a balance between privacy rights and the necessity for a fair trial.

Therefore, the correct answer is Option B: 1 and 2 Only. The solution thoroughly addresses each statement, confirming the accuracy of the correct option selected.

The primary objective of YD One, the lightest wheelchair introduced by IIT Madras, is to meet each user's unique body, posture, and mobility needs. This wheelchair is fully customized to ensure optimal comfort and functionality for individual users, representing a significant advancement in mobility technology.

The Tanimbar Islands are located in Indonesia, which is part of the Pacific Ring of Fire, a region known for its high seismic activity due to the convergence of multiple tectonic plates. This geographical feature is responsible for many earthquakes and volcanic eruptions in the area, including the recent 6.7 magnitude earthquake.

The recent discovery at CERN's LHCb experiment, highlighting the difference in behavior between matter and antimatter, is significant because it addresses the longstanding question of why the universe is predominantly composed of matter instead of antimatter. This finding could potentially explain the imbalance between matter and antimatter in the universe, a fundamental aspect of cosmology that has puzzled scientists for decades.

Both statements are accurate in their depiction of Coronal Mass Ejections (CMEs). Statement-I correctly describes CMEs as significant ejections of magnetized plasma from the Sun's corona formed through magnetic reconnection, similar to solar flares. Statement-II provides additional information regarding the speeds at which CMEs can travel and their potential impact when directed towards Earth, causing geomagnetic storms that can affect technology. Statement-II further elaborates on the consequences of CMEs, thereby explaining Statement-I. Hence, option A is the correct answer.

1. Statement 1: Tadoba-Andhari Tiger Reserve is indeed the largest tiger reserve in Maharashtra. This statement is correct as it encompasses both the Tadoba National Park and Andhari Wildlife Sanctuary, making it the oldest and largest reserve in the state.

2. Statement 2: This statement is incorrect. The name 'Andhari' is actually derived from the Andhari River that flows through the area, not from a local tribal deity. The name 'Tadoba' is connected to a local deity, which is revered by tribal communities in the region.

3. Statement 3: The reserve's vegetation is indeed predominantly Southern Tropical Dry Deciduous forests, which include tree species like teak, salai, and tendu. This statement is correct.

Thus, the correct statements are 1 and 3, making Option C the right answer.

1. Tadoba-Andhari Tiger Reserve — Located in the state of Madhya Pradesh

Incorrect. Tadoba-Andhari Tiger Reserve is located in Maharashtra, not Madhya Pradesh.

2. Kolsa Lake — Located within Tadoba-Andhari Tiger Reserve

Correct. Kolsa Lake is indeed part of the Tadoba-Andhari Tiger Reserve in Maharashtra.

3. Tanimbar Islands — Known for high seismic activity

Correct. The Tanimbar Islands are located in Indonesia, which is part of the Pacific Ring of Fire, an area known for high seismic activity.

4. Yamdena Island — Part of the Tanimbar Islands

Correct. Yamdena is indeed the largest island in the Tanimbar Islands group in Indonesia.

Thus, pairs 2, 3, and 4 are correctly matched.

1. YD One - Developed by IIT Madras and Thryv Mobility: This pair is correctly matched. YD One is indeed developed by IIT Madras in collaboration with Thryv Mobility as part of the TTK Center for Rehabilitation Research and Device Development.

2. Antimatter - Comprised of electrons, protons, and neutrons: This pair is incorrectly matched. Antimatter is comprised of antiparticles such as positrons (the antimatter counterpart of electrons), antiprotons, and antineutrons, not electrons, protons, and neutrons which are ordinary matter particles.

3. India's Clean Energy Target - Achieved 50% non-fossil fuel capacity by 2025: This pair is correctly matched. India has indeed achieved its target of having 50% of its installed electricity capacity from non-fossil fuel sources by 2025.

4. Antimatter Annihilation - Results in the release of gamma rays: This pair is correctly matched. The annihilation of antimatter and matter results in the release of large amounts of energy, often in the form of gamma rays.

Thus, only three pairs are correctly matched.

Statement-I talks about the discovery at CERN's LHCb experiment showing a difference in how matter and antimatter behave, which is accurate based on the provided information. Statement-II discusses a ruling by the Supreme Court of India allowing secretly recorded conversations between spouses as admissible evidence in matrimonial disputes, which is also accurate. However, these two statements are unrelated and do not explain each other. Therefore, both statements are correct, but Statement-II does not explain Statement-I.

Coronal Mass Ejections (CMEs) are primarily formed due to the twisting and realignment of the Sun's magnetic field. This process creates strong localized magnetic fields that puncture the solar surface in active regions, leading to the significant ejections of magnetized plasma observed during these phenomena. CMEs are integral solar events that can have notable effects on Earth's technological systems when directed towards our planet, highlighting the importance of understanding and monitoring solar activity.