Explanation:

The Vaikom Satyagraha was launched in 1924. The heart of this protest was at the Vaikom Mahadeva Temple, where the untouchables were not permitted to use a public road around it. x In February 1924, the Anti-Untouchability Committee held a public meeting in Vaikom, where it was decided that the rule barring temple roads to low castes would be defied by a group of satyagrahis. On March 30 volunteers from different parts of Travancore arrived in Vaikom. Hence, statement 1 is correct. x Periyar E.V. Ramaswamy was a great social reformer. In 1924, he took an active part in the Vaikam Satyagraha and provided leadership to the satyagraha. x In 1925, he started the “Self-Respect Movement”. He denounced the caste system, and child marriage and enforced widowhood. He himself conducted many marriages without any rituals. Such a marriage was known as a “Self- Respect Marriage.” Hence, Statement 2 is correct. x The Non-co-operation Movement was launched in 1920 and was withdrawn by Mahatma Gandhi in February 1922 after the Chauri Chaura incident. The Vaikom Satyagraha began in February 1924 two years after the Non-co-operation Movement was withdrawn. However, the Vaikom Satyagraha was supported by Mahatma Gandhi and it was during the satyagraha that Mahatma Gandhi met Sree Narayana Guru for the first time. Hence, statement 3 is not correct.