(A) 1961
(B) 1963
(C) 1964
(D) 1967
🧠 Explanation:
The Regional Cooperation for Development (RCD) was established on July 21, 1964, by Iran, Pakistan, and Turkey to promote socio-economic development among the member states. This initiative, headquartered in Tehran, Iran, aimed to foster cooperation in economic, technical, and cultural domains but was later dissolved in 1979 and replaced by the Economic Cooperation Organization (ECO) in 1985.2