Which of the following states has not ratified the Comprehensive Test Ban Treaty (CTBT)?

A. Canada

B. France

C. United States

D. None of these

Explanation:

Five of the 44 Annex 2 States have signed but not ratified the CTBT; they are China, Egypt, Iran, Israel, and the United States. The United States and China are the only remaining NPT Nuclear Weapon States that have not ratified the CTBT.