Headquarter of ECO is in? A) Ashgabat B) Tashkent C) Tehran D) None of these Related MCQs: The Predecessor organization of ECO is? Economic Cooperation Organization (ECO) is a successor organization of Regional Cooperation for Development (RCD), which was founded in? Which of the following is not a member of the Economic Cooperation Organisation (ECO)? Where the Headquarter of UNHCR is located?