Exp) Option a is the correct answer.

Option I is correct: Article 263 of Constitution of India provides for the establishment of Inter State Council of India to promote coordination and cooperation between the Centre and the States. It serves as a forum for discussing and resolving issues of common interest among the Union and State governments.

Option II is incorrect: The idea of establishing a National Security Council (NSC) in India was first proposed during a 1968 seminar at the Institute for Defence Studies and Analyses (IDSA), which later submitted a formal proposal to the Administrative Reforms Commission (ARC).The concept gained momentum in 1990 when Prime Minister V.P. Singh, amid rising concerns over a possible Pakistani nuclear test.Eventually, the NSC was formally established in 1999 by an executive order of the Government of India for national security and strategic affairs.

Option III is incorrect: Zonal Councils are statutory bodies established under States Reorganisation Act, 1956 to promote cooperative federalism by facilitating dialogue and coordination between states and the central government on key inter-state issues such as border disputes, inter-state transport, river water sharing, economic and social planning, and matters related to security and law and order.

Source: https://interstatecouncil.gov.in/isc-genesis/

https://orfamerica.org/newresearch/the-evolution-and-roles-of-indias-national-security-council

https://www.mha.gov.in/en/page/zonal-council

https://orfamerica.org/newresearch/the-evolution-and-roles-of-indias-national-security-council