Hello student,

Caste is a state specific subject.For instance a caste may be listed a scheduled in one state and backward caste in another state.Also there is a central list where the center gives a list if caste which the states has to declare those as that specified categories.Kindly check this official link of kerala state and central list to know those castes https://bcdd.kerala.gov.in/communities/sc-list/

http://socialjustice.nic.in/UserView/index?mid=76750

Best  wishes.