Zoology - Body Fluids and Circulation Question with Solution | TestHub

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