CTBT is a term associated with

Correct option is A

​CTBT or Comprehensive Nuclear-Test-Ban Treaty is an international agreement aimed at banning all nuclear explosions across the world, whether for civilian or military purposes. It was adopted by the United Nations in 1996. The primary goal of the CTBT is to prevent the development and proliferation of nuclear weapons and to promote global nuclear disarmament and peace. Although many countries have signed and ratified it, the treaty is yet to come into full legal force as some key nations have not ratified it.​