Correct option is C
The chairman of the Inter-State Council is the Prime Minister of India.
The Inter-State Council is a constitutional body set up on the basis of provisions in Article 263 of the Constitution of India.
The inter-state council is a recommendatory body that has been empowered to investigate and discuss subjects of common interest between the Union and state(s), or among states.
It also makes recommendations for better coordination of policy and action on these subjects, and deliberations on matters of general interest to the states, which may be referred to it by its chairman.
It also deliberates on other matters of general interest to the states as may be referred by the chairman to the council.
Its function to create a strong institutional framework to promote and support cooperative federalism in the country and activate the council and zonal councils by organising regular meetings.
Facilitates consideration of all pending and emerging issues of Centre-state and inter-state relations by the zonal councils and inter-state council.