Let h is a non-empty subset of a group g with property that if a and b belong to h then ab belongs to h then h is (a) h is subgroup of g g (c) h is abelian grou

Let H is a non-empty subset of a group G with property that if a and b belong to H then ab belongs to H then H is (a) H is subgroup of G G (c) H is abelian group Lot G ba a araunand Lat LLha a abaraun af G far 6isth (b) H is not subgroup of (d) None of above