The correct answer is: D. 1971
Sadar-e-Riyasat was the title of the head of state of Pakistan from 1956 to 1971. The office was abolished on 25 December 1971, when Pakistan was split into two separate countries, Pakistan and Bangladesh.
The office of Sadar-e-Riyasat was created by the Constitution of Pakistan, which was adopted on 23 March 1956. The Sadar-e-Riyasat was elected by the National Assembly and the Senate, and held office for a term of five years. The Sadar-e-Riyasat was the commander-in-chief of the armed forces, and had the power to appoint and dismiss the Prime Minister and the Cabinet.
The office of Sadar-e-Riyasat was abolished by the 3rd Amendment to the Constitution of Pakistan, which was adopted on 25 December 1971. The 3rd Amendment also abolished the office of Governor-General, and replaced the President of Pakistan with the Prime Minister.
The following are the brief explanations of each option:
- A. 1955: This option is incorrect because the office of Sadar-e-Riyasat was created in 1956.
- B. 1965: This option is incorrect because the office of Sadar-e-Riyasat was not abolished in 1965.
- C. 1969: This option is incorrect because the office of Sadar-e-Riyasat was not abolished in 1969.
- D. 1971: This option is correct because the office of Sadar-e-Riyasat was abolished in 1971.