The correct answer is option (4) because recipient is A blood group with Rh(−ve) antigen, hence cannot receive blood from any blood group with Rh(+ve) antigen and as A blood group individuals have anti-B antibodies in plasma. So, donor could be O(Rh−ve) and A(Rh−ve ) only. Options (1), (2) and (3) are not correct answers because B−,AB−and A+blood groups will lead to serve clumping reaction.