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

Option (a) is correct because the NPT specifically defines Nuclear Weapons States (NWS) as those that manufactured and exploded a nuclear device before January 1, 1967, a criteria met only by China and France among the choices provided. Option (d) is the most tempting error because while India, Pakistan, and Israel possess nuclear weapons, they are not signatories to the NPT and are therefore not legally recognized as NWS under the treaty's framework. The core concept being tested is the legal distinction between *de facto* nuclear-armed states and the *de jure* recognition of the five permanent UN Security Council members under international treaty law.