Explanation:

- Article 330: Provides for the reservation of seats for Scheduled Castes (SC) and Scheduled Tribes (ST) in the Lok Sabha, not about administration of scheduled areas.

- Article 339: Deals with the control of the Union over the administration of Scheduled Areas and the welfare of Scheduled Tribes. It empowers the President to appoint a commission to report on the administration of these areas, with recommendations for better governance.

- Article 275: Provides for grants-in-aid to the states from the Consolidated Fund of India for improving the welfare of Scheduled Tribes and implementing schemes for their development.

- Article 366: Contains definitions related to the Constitution. It does not specifically address the administration of Scheduled Areas or Scheduled Tribes.

Correct Answer: Option 2, Article 339