The correct answer is D. By the introduction of a bill in either House of Parliament.
The Constitution of India can be amended by a bill passed by both Houses of Parliament with a special majority (i.e., a majority of the total membership of each House and a majority of the members present and voting) and ratified by the legislatures of at least half of the states.
The President of India has no power to initiate an amendment to the Constitution. However, the President can give his assent to a bill passed by Parliament to amend the Constitution.
The Governors of States do not have any power to initiate an amendment to the Constitution. However, the Governors of States can send a report to the President of India if they feel that a particular amendment is necessary.
The introduction of a bill in either House of Parliament is the first step in the process of amending the Constitution. The bill is then referred to a select committee of the House, which examines the bill and makes recommendations. The bill is then debated and voted upon in the House. If the bill is passed by the House, it is sent to the other House for consideration. If the bill is passed by both Houses, it is sent to the President of India for his assent. If the President gives his assent, the amendment becomes law.