The correct option is A the President
Article 75(2) specifically provides that the ministers shall hold office during the pleasure of the President. All the ministers are appointed by the President on the advice of the Prime Minister. Each minister has an individual responsibility. The Prime Minister me call for the resignation of any ministers at any time. In case the Minister refuses, the Prime Minister may advise the President to dismiss the Minister. Losing the confidence of the Prime Minister leads to dismissal by the President.