Who of the following organized a march on the Tanjore coast to break the Salt Law in April 1930?

1. The question asks who organized a march on the Tanjore coast to break the Salt Law in April 1930. 2. This event was part of the larger Civil Disobedience Movement and the Salt Satyagraha initiated by Mahatma Gandhi. 3. Inspired by Gandhi's Dandi March, C. Rajagopalachari (Rajaji) led a similar march in South India. 4. This march, known as the Vedaranyam March, started from Trichinopoly (Tiruchirappalli) and ended at Vedaranyam on the Tanjore coast, where the participants defied the British Salt Law by making salt. 5. V. O. Chidambaram Pillai was a prominent nationalist leader involved in the Swadeshi movement earlier, known for his Swadeshi Steam Navigation Company. 6. K. Kamaraj was a significant political figure in Tamil Nadu, but his prominence grew later, and he was not the primary organizer of this specific 1930 march. 7. Annie Besant was associated with the Home Rule Movement and the Theosophical Society; she was not actively involved in the Salt Satyagraha of 1930. 8. Therefore, C. Rajagopalachari is the correct answer.