A social reformer and founder of the Swaminarayan movement:

Sahajanand Swami
Dayanand Saraswati
Raja Ram Mohan Roy
Swami Vivekananda

The correct answer is: Sahajanand Swami.

Sahajanand Swami was a social reformer and founder of the Swaminarayan movement. He was born in 1781 in Chhapaiya, Gujarat, India. He was a Hindu saint and reformer who preached against caste discrimination and social injustice. He founded the Swaminarayan sect of Hinduism, which is one of the largest Hindu sects in India.

Dayanand Saraswati was a Hindu reformer and the founder of the Arya Samaj. He was born in 1824 in Tankara, Gujarat, India. He was a scholar of Sanskrit and Vedic literature. He preached against idol worship and caste discrimination. He founded the Arya Samaj in 1875, which is a Hindu reform movement that promotes Vedic Hinduism.

Raja Ram Mohan Roy was a Bengali polymath who is considered the father of modern India. He was born in 1772 in Radhanagar, Bengal, India. He was a social reformer, writer, and philosopher. He founded the Brahmo Samaj in 1828, which is a Hindu reform movement that promotes monotheism and social reform.

Swami Vivekananda was a Hindu monk and a chief disciple of Ramakrishna. He was born in 1863 in Kolkata, India. He was a preacher, teacher, and philosopher. He founded the Ramakrishna Mission in 1897, which is a Hindu monastic order that promotes social service and education.

Sahajanand Swami was the founder of the Swaminarayan movement, which is a Hindu sect that is one of the largest Hindu sects in India. He was a social reformer who preached against caste discrimination and social injustice. He was born in 1781 in Chhapaiya, Gujarat, India. He was a Hindu saint and reformer who preached against caste discrimination and social injustice. He founded the Swaminarayan sect of Hinduism, which is one of the largest Hindu sects in India.