Explanation:

- The Rajamundri Social Reform Association was founded in 1871.

- Its main aim was to encourage widow remarriage in Andhra region.

- Veeresalingam Pantulu (Option 1) was a famous social reformer from Andhra Pradesh. He is widely credited for pioneering the widow remarriage movement in Andhra and founded this association.

- K. Ramakrishnan Pillai (Option 2) was a reformer from Kerala, known for social justice work, but not linked to Rajamundri.

- K. T. Telang (Option 3) was a judge and social reformer from Bombay, involved with Prarthana Samaj.

- Gopalachariar (Option 4) was a South Indian leader, but not associated with the Rajamundri Social Reform Association.

Correct Answer: Option 1 — Veeresalingam