The correct option is D Ramanujacharya
It was Ramanujacharya who propounded the Vishistadwaita philosophy. Shankaracharya proposed the Adwaita philosophy and Yadavaprakasha, Ramanujacharya's teacher was also a follower of the Adwaita philosophy. Keshava Somayaji who was Ramanujacharya's father did not propound the Vishistadwaita philosophy.