The correct option is A 1 November, 1973
The entire Kannada-speaking population was brought together from the Bombay and Madras presidencies, the Hyderabad princely state, and the Kodagu province. Subsequently, the Vishal Mysore State was formed on 1 November, 1956. It was renamed as Karnataka, in 1973. The 'Kannada Rajyotsava Day' is celebrated every year, to remember the formation of the state of Karnataka.