The correct option is D The merger of the regions under Bombay and Madras presidencies, the Hyderabad princely state, and the Kodagu province.
After independence, the process of reorganisation of states along linguistic lines was initiated. This led to the merger of regions under Bombay and Madras presidencies, the Hyderabad princely state, and the Kodagu province, where the Kannada speaking population resided. This eventually led to the formation of a Kannada state that primarily contained a Kannada-speaking population.