The correct option is D Ramanand taught in Sanskrit.
Ramanand established Vaishnava religious school and condemned the caste system. His teachings were similar to those of Ramanujacharya but he did not teach in Sanskrit but instead, in Hindi. He originally had 12 disciples who are believed to have included at least one woman, members of the lower caste including the leatherworker Ravidas, and a Muslim, the mystic Kabir.