Common between B and T cells - (PGI Nov 14): (A) Origin from same cell lineage, (B) Site differentiation, (C) Antigenic mark, (D) Both humoral and cellular immunity
Answer is A. 1. Both T and B cells originate from same cell lineage - Lymphoid lineage 2. But, differentiation occurs at different sites-T-cell in Thymus & B-cell in Bone marrow.