The correct answer is (b). The Vice-President of India is the ex-officio Chairman of the Council of States. The Vice-President is elected by an electoral college consisting of members of both Houses of Parliament and the legislative assemblies of the states. The Vice-President holds office for a term of five years and is eligible for re-election. The Vice-President is the second highest constitutional office in India, after the President. The Vice-President is the presiding officer of the Rajya Sabha, the upper house of the Indian Parliament. The Vice-President also has the power to act as President in the event of the President’s death, resignation, or removal from office.
The other options are incorrect. The President of India is the head of state of India and the Commander-in-Chief of the Indian Armed Forces. The Prime Minister of India is the head of government of India and the leader of the party or coalition that has the majority of seats in the Lok Sabha, the lower house of the Indian Parliament.