The Nuclear Non - Proliferation Treaty came into force in -

A. 1967

B. 1970

C. 1971

D. 1974

Answer: Option B

Solution(By Examveda Team)

Opened for signature in 1968, the Nuclear Non - Proliferation Treaty entered into force in 1970. On 11 May 1995, the Treaty was extended indefinitely. A total of 191 States have joined the Treaty, including the five nuclear - weapon States.