The Constitutional authority, vested with the power of declaring castes and tribes as the scheduled Castes and Schedule Tribes, is the

The correct answer is A) President of India. Under Article 341 (Scheduled Castes) and Article 342 (Scheduled Tribes), the President, after consultation with the Governor of the state (or the Administrator of a Union Territory), issues a public notification specifying the castes, races or tribes to be treated as SC or ST for that area. Parliament alone can then include or exclude groups by law, and a later presidential notification cannot alter a list that Parliament has already changed.

• B) Prime Minister: The PM heads the government but has no constitutional role in notifying SC/ST lists.
• C) Minister of Social Welfare: The ministry administers welfare schemes and may propose changes, but it does not hold the constitutional power to declare castes or tribes.
• D) Chairman, SC/ST Commission: The National Commissions under Articles 338 and 338A investigate safeguards and advise the government. They do not declare castes or tribes.

Mains angle: because the lists are state-specific, a community can be SC in one state and not in another, which often comes up in debates on inclusion demands. Trap: students mix up 'declaring' with 'monitoring' or 'implementing', and pick the commission or the ministry.