Hello, caste is a state specific subject meaning a state can declare a caste as forward while other state can declare the same as backward category. Kindly specify the origin state so that we can provide you with that state list of categories. Here is the list of centrally recognized backward classes based on the state, the state may have additional categories added on its own http://www.ncbc.nic.in/user_panel/centralliststateview.aspx

Hope this helps.