The correct option is A For violation of the Constitution.
Impeachment is the process by which President is removed from office. The charges of Impeachment can be initiated in either house of the Parliament. For this, charges should be signed by 1/4th members of that house who has initiated or framed charges against the President. Also, a 14 days notice should be given to the president. The President may be removed before the expiry of the term through impeachment for violating the Constitution of India by the Parliament of India.