Concept:Prarthana Samaj was a socio-religious reform movement in 19th-century Bombay.
Explanation:The spread of Western education and modern ideas in the 19th century led to the rise of many reform movements in India.
Prarthana Samaj was one such movement, established in Bombay.
It was founded by Atmaram Panduranga.
Later, the reformer Mahadev Govind Ranade joined it and became its chief architect, but he was not the founder.
Dayanand Saraswati founded the Arya Samaj, and Swami Vivekananda founded the Ramakrishna Mission.
Therefore, among the given options, Atmaram Panduranga is the founder of Prarthana Samaj.
Answer:A. Atmaram Panduranga