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

According to the language data released based on the 2011 Census of India:
* Sanskrit is listed as the least spoken scheduled language in India, with only around $24,821$ speakers registering it as their mother tongue.
* Comparatively, Konkani has around $2.2$ million speakers, Dogri has around $2.6$ million speakers, and Assamese has over $15$ million speakers.