Name the person who has been the president as well as the Prime Minister of Pakistan.

(A) Napoleon(B) Bismarck(C) Hitler(D) de Gaulle

(A) Speaker of National Assembly (B) Chairman of Senate (C) Chief Justice of Pakistan (D) Deputy Prime

(A) Ayub Khan (B) Yahya Khan (C) Zia-ul-Haq (D) Pervaiz Mushraff