Where is the headquarters of OPEC? By Kalsoom Tahir ✅ Fact Checked 📊 Difficulty Medium 📅 Last Updated 13 Aug 2026 A. Geneva B. Dubai C. Vienna D. Riyadh Check Answer 💡 Explanation: OPEC is headquartered in Vienna, Austria. 📚 Topics: International Organizations Politics and Government 🎯 Exams: CSS GEN NTS PMS
