How many Governor Generals ruled Pakistan

Pakistan had six Governor Generals from 1947 until 1956 when the system was replaced by the office of the President under the first constitution. The Governor Generals were Muhammad Ali Jinnah Khawaja Nazim ud Din Ghulam Muhammad Iskander Mirza and two others during this period. The role was significant in shaping the early political system of Pakistan. Governor Generals had wide powers which sometimes created political instability. Their era ended when Pakistan adopted the 1956 Constitution and became the Islamic Republic of Pakistan. The correct answer is option C which is six Governor Generals.