Conversation so far:
which is the most cleanest state of india
Sikkim, the small north eastern hill state, is the cleanest in India.
which is the most cleanest state of india after sikkim
Kerala comes in a close second, according to a Swachhta survey conducted by the National Sample Survey Office on the condition of sanitation in rural areas of the states.
how many states does India have
India is a federal union comprising 28 states and 8 union territories, for a total of 36 entities.
which is india's largest state
By area, Rajasthan is the largest Indian state.

Question: what about by population
Self-contained rewrite: which is india's largest state by population