The headquarters of Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) is located in _______ country ?

a) Lausanne
b) London
c) Vienna
d) None of these

The Comprehensive Nuclear-Test-Ban Treaty Organization is an international organization that will be established upon the entry into force of the Comprehensive Nuclear-Test-Ban Treaty, a Convention that outlaws nuclear test explosions. Its seat will be Vienna, Austria.