According to Census 2011, which of the following languages is spoken by the least population in India?

The correct option is Sanskrit.

According to the Census of India 2011, language statistics published under the Eighth Schedule of the Indian Constitution detail the total number of native speakers for each of the 22 scheduled languages. Among the choices provided, Sanskrit is spoken by the least population in India.

A comparison of the speaker populations based on Census 2011 data:
1. Sanskrit: Spoken by approximately 24,821 people, making it the least spoken scheduled language in India.
2. Konkani: Spoken by approximately 22.5 lakh (2.25 million) people.
3. Dogri: Spoken by approximately 24.7 lakh (2.47 million) people.
4. Assamese: Spoken by approximately 1.53 crore (15.3 million) people.

Therefore, Sanskrit has the lowest number of speakers among the given options.