The correct answer is (a). The Indian Parliament consists of two houses: the Lok Sabha (House of the People) and the Rajya Sabha (Council of States). The Lok Sabha is directly elected by the people, while the Rajya Sabha is indirectly elected by the state legislatures. The President of India is the head of the Parliament, but has no power to vote.
(b) is incorrect because the Prime Minister is not a part of the Parliament. The Prime Minister is the head of the government, but is appointed by the President and is responsible to the Parliament.
(c) is incorrect because the Speaker is not a part of the Parliament. The Speaker is the presiding officer of the Lok Sabha, but is not a member of the House.
(d) is incorrect because the President is not a part of the Parliament. The President is the head of state, but has no power to vote in the Parliament.