The correct option is C Keshub Chunder Sen
Prarthna Samaj, was founded by the Dadoba Pandurang and his brother Atmaram Pandurang in 1867. The aim of the society is to promote social reform, theistic worship, widow remarriage etc. In 1864 Keshab Chunder Sen, founder of the Bharatvarshiya Brahmo Samaj, visited Bombay, and his joining the society made the samaj popular and gained support and follower from all over the India.