Indus River is one of the longest rivers in Asia, flowing through multiple countries including India, Pakistan, and China. It originates in the Tibetan plateau and flows through the Himalayas before entering the plains of Pakistan.

The Indus River is known for its numerous tributaries, which are smaller rivers that join the main river. The right-hand tributaries of the Indus River are those that join it from the right side when looking downstream. Among the options provided, the correct answer is option 'D', which includes Jhelum, Swat, and Gilgit as the right-hand tributaries of the Indus River.

Below is an explanation of each of these tributaries:

1. Jhelum: The Jhelum River is one of the major tributaries of the Indus River. It originates from the Verinag Spring in the Indian-administered union territory of Jammu and Kashmir. It flows through the Kashmir Valley and enters Pakistan near the city of Jhelum. The Jhelum River then joins the Chenab River, which is itself a tributary of the Indus River.

2. Swat: The Swat River is another important right-hand tributary of the Indus River. It originates from the Hindu Kush mountain range in northern Pakistan and flows through the Swat Valley. The river eventually joins the Kabul River, which is a tributary of the Indus River.

3. Gilgit: The Gilgit River is also a right-hand tributary of the Indus River. It originates from the Gilgit-Baltistan region of Pakistan and flows through the Karakoram Range. The river joins the Indus River near the city of Jaglot.

These three rivers, Jhelum, Swat, and Gilgit, are significant tributaries of the Indus River and play a crucial role in its overall flow and drainage system. They contribute to the water resources, agriculture, and hydroelectric power generation in the region.

In conclusion, the correct answer is option 'D' (2, 3, and 4 only) as Jhelum, Swat, and Gilgit are the right-hand tributaries of the Indus River.

Option (d) is the correct answer.