(c) Union executive consists of the President, the Vice-President and the Council of Ministers with the Prime Minister as the head to aid and advice the President. The Ministers (included Council of Minister) are appointed by the President on the advice of the Prime Minister. Hence, option (c) is correct. The correct form of statement (a), (b) and (d) are - - According to the Constitution of India, the total number of ministers in the Council of Ministers must not exceed 15% of the total number of members of Lok Sabha. - The rank of different ministers in the Union Council of Ministers is determined by the Prime Minister. - Ministers are appointed by legislature.