Moderate

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

  • 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

No agglutination with anti-A or anti-B indicates that the red cells lack A and B antigens, identifying group O. Lack of agglutination with anti-D indicates Rh-negative blood, giving O Rh-negative.

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