"To uphold and protect the Sovereignty, Unity and Integrity of India" is a provision made in the

1. A

   Preamble of the Constitution

   The Preamble speaks of the unity and integrity of the Nation as a resolve, but the exact duty ‘to uphold and protect the sovereignty, unity and integrity of India’ is not a Preamble clause in the form asked. This option is not the key.

2. B

   Directive Principles of State Policy

   Directive Principles guide the State; they do not impose this citizen duty. This option is therefore wrong.

3. C

   Fundamental Rights

   Fundamental Rights are justiciable guarantees to individuals, not this duty of the citizen. This option is not the key.

4. D

   Fundamental Duties

   Article 51A(c) of the Fundamental Duties requires every citizen to uphold and protect the sovereignty, unity and integrity of India. That is the provision quoted. This option is the official key.

Summary. Official key is (d) Fundamental Duties. The 42nd Amendment inserted Article 51A, including the sovereignty-unity-integrity duty. The Preamble’s language is related but not the operative duty. DPSPs bind the State; Fundamental Rights protect persons. The question quotes the duty text, which sits only in 51A.