Answer
C. Rajagopalachari composed a song set to Carnatic music, a form of music that originated in South India. The song was called "Bharat Mata", and it was written in praise of India. Rajagopalachari was a staunch nationalist, and he believed that India should be a strong and independent country. The song "Bharat Mata" reflected his beliefs, and it was well-received by the Indian people.