Which of the following statement/s is/are correct?

(A) In the Tamil region right-hand and left hand groups were known as idangai and valangai respectively

(B) Both the right hand and left-hand groups included non-peasant castes such as those of artisans as well as higher ranking castes 

(C) Both the right-hand and left-hand groups usually excluded the outcastes, notably the Paraiyas

Choose the correct answer from the options given below: