In the Constitution of India, promotion of international peace and security is included in the
- Ninth Schedule
- Fundamental Duties
- Directive Principles of State Policy (DPSP)
- Preamble to the Constitution
Article 51 ensure that the State shall strive for the promotion and maintenance of international peace and security, just and honourable relations between nations, respect for international law and treaty obligations, as well as settlement of international disputes by arbitration.
The correct option is C.