A. 1972
B. 1969
C. 1970
D. 1971
🧠 Explanation:
- Pakistan joined the **Organization of Islamic Cooperation (OIC)** in **1969**, the year it was founded.
- The first OIC summit was held in Rabat, Morocco, in response to the arson attack on Al-Aqsa Mosque in Jerusalem.
- Pakistan has been an active member, often playing a prominent role in addressing issues concerning the Muslim world.
- The OIC serves as a collective voice of the Muslim nations, focusing on political, economic, and cultural cooperation.