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As of November 2026, which country is a party to the Treaty on the Non-Proliferation of Nuclear Weapons…

China acceded to the treaty in 1992. The treaty recognizes as nuclear-weapon states those that manufactured and detonated a nuclear explosive before 1 January 1967. China…

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As of November 2026, which country is a party to the Treaty on the Non-Proliferation of Nuclear Weapons and meets its definition of a nuclear-weapon state in Article IX(3)?

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Answer and explanation

Correct answer B

China acceded to the treaty in 1992. The treaty recognizes as nuclear-weapon states those that manufactured and detonated a nuclear explosive before 1 January 1967. China meets that definition. North Korea acceded as a non-nuclear-weapon state and later announced its withdrawal.

Option feedback

Option A

Israel has not joined the NPT.

Option B

China acceded in 1992 and meets the treaty’s pre-1967 test.

Option C

North Korea acceded as a non-nuclear-weapon state and later announced withdrawal. It does not meet the treaty’s pre-1967 test.

Option D

India has not joined the NPT.

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