Physiology In a blood sample antiserum A and antiserum B and Rh +ve factor is added. No agglutination is seen. This is: A O group and Rh+ve B O group and Rh-ve C AB group and Rh+ve D AB group and Rh-ve 💡 Explanation In a blood sample antiserum A and antiserum B and Rh +ve factor is added. No agglutination is seen. This is: ✓ Correct Answer: B. O group and Rh-ve