Blood Compatibility for Group B Recipient

Steps:

• Identify recipient B's profile: B antigens on RBCs, anti-A antibodies in plasma.
• Determine donor compatibility: Donor RBCs must lack A antigens to avoid reaction with recipient's anti-A.
• Eliminate donors with A antigens: A (A antigen) and AB (A and B antigens) are incompatible.
• Confirm safe donors: B (B antigen only, no anti-B in recipient) and O (no antigens) work.

Why D is correct:

• B and O donors have no A antigens, preventing agglutination by recipient B's anti-A antibodies.

Why the others are wrong:

• A: Donor A has A antigens, attacked by recipient's anti-A antibodies.
• B: Donor AB has A antigens, triggering anti-A reaction.
• C: Donor AB has A antigens, causing incompatibility.

Final answer: D