The correct answer is: A. 1960.
Mahagujarat Janata Parishad was formed in 1960. It was a political party in India that was formed to demand the creation of a separate state of Gujarat from the state of Bombay. The party was successful in its demand, and Gujarat was created as a separate state in 1960. The party merged with the Janata Party in 1977.
The other options are incorrect. Option B, 1956, is the year in which the States Reorganisation Act was passed. This act led to the reorganization of states in India on linguistic lines. Option C, 1958, is the year in which the first general elections to the Lok Sabha were held. Option D, 1963, is the year in which the Indo-China War broke out.