Correct Answer:
A. Justice Shahabuddin
The correct answer is Justice Shahabuddin. The commission that framed the 1962 Constitution under the direction of President Ayub Khan was headed by Justice Shahabuddin. He was the Chief Justice of Pakistan at that time. The commission was tasked with creating a new constitution that would establish a presidential system of government in Pakistan. Justice Munir was the Chief Justice who refused to sign the 1956 Constitution, Justice Cornelius was the Chief Justice from 1960 to 1968, but he was not the head of this commission. Therefore, Justice Shahabuddin is the correct answer.