Correct Answer:
A. Ayub Khan
Nawab Amir Muhammad Khan of Kalabagh served as the Governor of West Pakistan from 1960 to 1966. This period directly corresponds with the presidency of Field Marshal Ayub Khan, who ruled Pakistan from 1958 to 1969. Governors during this era were appointed by the President. Zulfikar Ali Bhutto (B), Muhammad Zia-ul-Haq (C), and Pervez Musharraf (D) all served as presidents much later than the 1960s. Therefore, Ayub Khan is the correct president during Nawab Amir Muhammad Khan's governorship.