The correct answer is (a) The President.
The Rajya Sabha is the upper house of the Indian Parliament. It is a permanent body and cannot be dissolved. However, the President can dissolve the Lok Sabha, the lower house of Parliament, at any time. If the President dissolves the Lok Sabha, the Rajya Sabha also stands dissolved.
The Prime Minister is the head of the government and is appointed by the President. The Council of Ministers is a group of ministers who are appointed by the Prime Minister. The Council of Ministers is responsible to the Lok Sabha.
The President is the head of state and is elected by an electoral college consisting of members of both houses of Parliament and the legislative assemblies of the states. The President has the power to dissolve the Lok Sabha, but only on the advice of the Prime Minister.
The Rajya Sabha is composed of 250 members, of whom 12 are nominated by the President and the remaining 238 are elected by the members of the legislative assemblies of the states and the union territories. The term of office of a member of the Rajya Sabha is six years.
The Rajya Sabha has a number of important powers, including the power to amend the Constitution, the power to approve treaties, and the power to impeach the President.