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 state, but has limited powers. The Prime Minister is the head of government and is responsible to the Lok Sabha.
Option (b) is incorrect because it includes the Prime Minister, who is not a member of Parliament. Option (c) is incorrect because it includes the Speaker, who is the presiding officer of the Lok Sabha. Option (d) is incorrect because it includes the President, who is not a member of Parliament.