Who founded Brahmo Samaj?

The correct answer is Option 4- Raja Ram Mohan Roy

Raja Ram Mohan Roy founded Brahmo Samaj in 1828. He was a social and religious reformer who believed in a monotheistic God and advocated for social reform in India. Brahmo Samaj was a key part of the Indian Renaissance and helped to promote social and religious reform in India.

The other options on the list are all important figures in Indian history, but they did not found Brahmo Samaj. Ishwar Chand Vidyasagar was a social reformer who worked to improve the status of women in India. Swami Dayanand Saraswati was the founder of the Arya Samaj, another Hindu reform movement. Keshav Chandra Sen was a leader of the Brahmo Samaj in the 19th century.