The correct answer is (c).
The Sarkaria Commission was a commission set up by the Government of India in 1983 to review the relationship between the central government and the state governments in India. The commission submitted its report in 1988, and the Inter-State Council was set up in 1990 based on the recommendations of the report.
The First Administrative Reform Commission was set up in 1966 to review the administrative system of India. The commission submitted its report in 1968, and the Planning Commission was set up in 1950 to formulate and implement the Five Year Plans of India. The Law Commission is a statutory body set up by the Government of India to review the laws of India.
The Inter-State Council is a forum for consultation and cooperation between the central government and the state governments. The council is chaired by the prime minister, and it has representatives from the central government and the state governments. The council is responsible for discussing and resolving issues that arise between the central government and the state governments.