The Sarkaria Commission was set up to examine:

The correct answer is: a) Center-State relations.

The Sarkaria Commission was a commission set up by the Government of India in 1983 to examine and review the relationship between the central government and the state governments in India. The commission was headed by Justice R. S. Sarkaria and submitted its report in 1988. The report made a number of recommendations for improving the relationship between the central government and the state governments, including the need for greater consultation and cooperation between the two levels of government.

The other options are incorrect because:

• Option b) Economic reforms: The Sarkaria Commission was not set up to examine economic reforms. Economic reforms were initiated by the Government of India in the early 1990s.
• Option c) Caste-based reservations: The Sarkaria Commission was not set up to examine caste-based reservations. Caste-based reservations are a system of affirmative action in India that provides preferential treatment to members of certain castes and communities.
• Option d) Judicial activism: The Sarkaria Commission was not set up to examine judicial activism. Judicial activism is a term used to describe the practice of judges in using their power to make decisions that have a significant impact on public policy.