The correct option is B state
In post-independence India, the Naga National Council (NNC), under the leadership of Phizo, started demanding an independent state for Nagaland. When it was not fulfilled, the NNC announced the establishment of an independent federation of Nagaland. After several discussions between the NNC and the Indian Government, Nagaland was made a Union Territory. On 1 December 1963, it was given the status of a state.