Correct Answer:
B. Iskandar Mirza
The question pertains to the foundational leadership of Pakistan following its independence and the adoption of its first constitution.
- Iskandar Mirza is the correct answer. He became the first President of Pakistan on March 23, 1956, when the country transitioned from a dominion to an Islamic Republic under its newly promulgated constitution.
- Zulfikar Ali Bhutto served as President much later, from 1971 to 1973, before becoming Prime Minister.
- Ayub Khan was the second President, coming to power after imposing martial law in 1958 and ousting Mirza.
- Liaquat Ali Khan was Pakistan's first Prime Minister, assassinated in 1951, and never held the presidential office.
This highlights the critical shift in Pakistan's governance structure in the mid-1950s.