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

C. Rajagopalachari led the Vedaranyam Salt March from Trichinopoly to the Tanjore coast in April 1930 to break the salt law, mirroring Mahatma Gandhi’s Dandi March. While V. O. Chidambaram Pillai was a prominent nationalist leader in Tamil Nadu, his primary contributions occurred during the earlier Swadeshi Movement (1905–1911) rather than the 1930 Salt Satyagraha. This question tests the core concept of the regional leadership and geographical spread of the Civil Disobedience Movement across India.