If mother is Rh- Negative, in second pregnancy indirect antibody test is used to detect?

Q. If mother is Rh- Negative, in second pregnancy indirect antibody test is used to detect ?

A.            IgG antibody

B.            IgM antibody

C.            Sensitized RBCs in mother blood

D.            Sensitized antibodies in mother serum

Answer: Sensitized antibodies in mother serum