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Under the NPT, how many states count as nuclear weapon states?

ANine
BSeven
CTwelve
DFive
Answer & Solution
Correct answer: D. Five
1. A nuclear weapon state exploded a device before 1 January 1967. 2. Five qualify: US, USSR, Britain, France, China. 3. The NPT was signed on 1 July 1968. _Source: NCERT Class 12 Political Science, Contemporary World Politics, Chapter 1, The Cold War Era._
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