The answer to the question is option 'B', Sanskrit.

Explanation:

The manuscripts mentioned in the question were written in the Sanskrit language. Here is a detailed explanation:

1. Introduction to Manuscripts:
Manuscripts are handwritten documents that were produced before the invention of printing presses. They played a crucial role in preserving and transmitting knowledge across various cultures and civilizations. These manuscripts were written on materials such as palm leaves, birch bark, paper, and other materials available during ancient times.

2. Languages used in Manuscripts:
There were numerous languages used in ancient manuscripts, depending on the region, culture, and time period. Some of the common languages used in manuscripts include Sanskrit, Greek, Latin, Arabic, Persian, Chinese, Hebrew, Tamil, and many others.

3. Importance of Sanskrit in Manuscripts:
Sanskrit is one of the oldest known languages and has been a significant language for religious, philosophical, and literary texts in ancient India. It has served as the primary language for numerous manuscripts, especially those related to Hinduism, Buddhism, Jainism, and other Indian philosophical traditions.

4. Sanskrit Manuscripts:
Sanskrit manuscripts cover a wide range of subjects, including Vedic literature, epics like the Mahabharata and Ramayana, Puranas, Upanishads, philosophical treatises, Ayurveda, astronomy, mathematics, grammar, and more. These manuscripts were meticulously transcribed by scribes and scholars, ensuring the preservation and propagation of knowledge.

5. Sanskrit as a Sacred Language:
Sanskrit holds a revered status in Indian culture as it is considered a sacred language. It is believed that the sound and pronunciation of Sanskrit have a profound impact on the human mind and consciousness. Due to its importance, Sanskrit was chosen as the language for religious and philosophical scriptures, resulting in a vast number of manuscripts being written in this language.

Conclusion:
In conclusion, the manuscripts mentioned in the question were written in the Sanskrit language. Sanskrit has been a crucial language for preserving and transmitting knowledge in ancient India, and numerous manuscripts covering various subjects were written in this language.

Sanskrit was invented before hindi so the common people used to only know sanskrit and prakrit. prakrit was much harder to understand so the common people or vish used sanskrit. So back to ur answer the correct option is b