Multiple choice

Mother-foetus incompatibility problems originate from

  1. the mother's antibodies agglutinating the embryo's Rh positive RBCs

  2. the embryo's antibodies agglutinating his own RBCs.

  3. the embryo's antibodies agglutinating his mother's RBCs.

  4. the mother & embryo's antibodies agglutinating each other's RBCs.
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A Correct answer
Explanation

As a result of fetal blood entering the mother's system during her first pregnancy with an Rh positive baby, she will regularly produce antibodies to Rh antigens. They will pass through the placental barrier into her fetus and agglutinate its blood.

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