What is the real ritual during death cremation or burial?

While remembering my grand mom on her death anniversary my own aunt my mother's young sister told me to do cremation after she dies for which I told her we are not Brahmins to do it and burial is how they follow our caste and that is best for which I had a argument with her on this matter well I want to know all are not cremating their dead and we follow our caste rituals