Consider the following countries 1) China 2) France 3) India 4) Israel 5) Pakistan Which among the countries given above are Nuclear Weapons States as recognized by the Treaty on the Nonproliferation of Nuclear Weapons, commonly known as Nuclear Non-Proliferation Treaty (NPT)?

The answer is A, China and France. Article IX(3) of the NPT defines a nuclear weapon state as one that manufactured and exploded a nuclear device before 1 January 1967. That gives exactly five states: the USA, UK, Russia (USSR), France and China. Of the five countries in this list, only China and France qualify.

• 1 China: Correct. It tested in 1964, before the cutoff, and joined the NPT as a recognised nuclear weapon state in 1992.
• 2 France: Correct. It tested in 1960 and joined the NPT as a recognised nuclear weapon state in 1992.
• 3 India: Not an NPT party. Its tests in 1974 and 1998 came after the 1967 cutoff, and it has never joined as a weapon state.
• 4 Israel: Not an NPT party. It maintains a policy of nuclear ambiguity and is outside the treaty framework.
• 5 Pakistan: Not an NPT party. Its first tests came in 1998, after the cutoff.

The core concept is the difference between de facto nuclear powers and NPT-recognised nuclear weapon states. This matters for Mains GS-II on international treaties and India's non-proliferation stance, including the 2008 NSG waiver.

Trap: Assuming every nuclear-armed state is an NPT nuclear weapon state. India, Pakistan and Israel have weapons but sit outside the treaty.