The correct option is C Dalit
Omprakash Valmiki was an Indian Dalit writer and poet well known for his autobiography, Joothan, considered a milestone in Dalit literature. Besides Joothan (1997) Valmiki published three collections of poetry: Sadiyon Ka Santaap (1989), Bas! Bahut Ho Chuka (1997), and Ab Aur Nahin (2009).