Multiple choice

Which blood group does not have any antigen but possesses both a and b antibodies?

  1. A

  2. O

  3. B

  4. AB

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Blood group O has no A or B antigens on red blood cells but possesses both anti-A and anti-B antibodies in plasma. This makes O the universal donor (no antigens to react) but universal recipient for plasma only.