Correct Answer: (c) Gujarat, Maharashtra, Rajasthan and Madhya Pradesh
Solution:Under the Inter-State Water Disputes Act, 1956, the Central Government constituted Narmada Water Disputes Tribunal (NWDT) on 6 October 1969 to adjudicate upon the sharing of Narmada waters and for Narmada River valley development among the four States of Gujarat, Madhya Pradesh, Maharashtra and Rajasthan.