সঠিক উত্তর হচ্ছে: বন, জার্মানি
ব্যাখ্যা: The UNFCCC secretariat (UN Climate Change) was established in 1992 when countries adopted the United Nations Framework Convention on Climate Change (UNFCCC). Since 1995, the secretariat is located in Bonn, Germany. Source: unfccc.int
