Antigen involved in post transplant rejection -: (A) HLA - Antigen, (B) Nuclear antigen, (C) Polysaccharide, (D) DHA
Answer is A. Ans. is 'a' i.e., HLA - antigen For rejection of graft, there must be some antigen that is recognized as foreign and the most impoant antigen is HLA antigen of grafted tissue.