NEETZoologyBody Fluids and Circulation
Which of the following couples has the potential to conceive a child who may suffer from erythroblastosis foetalis in a subsequent pregnancy?
Options
- AMother A ^ + ve and Father O ^ - ve
- BMother B ^ - ve and Father B ^ - ve
- CMother O ^ - ve and Father AB ^ + ve
- DMother AB ^ + ve and Father A ^ + ve
Correct answer
C. Mother O ^ - ve and Father AB ^ + ve
Step-by-step solution
Erythroblastosis foetalis (Haemolytic Disease of the Newborn) occurs due to Rh incompatibility when an Rh ^ - ve mother carries an Rh ^ + ve foetus. For the foetus to be Rh ^ + ve , the father must carry and pass on the Rh ^ + ve trait. The ABO blood group is irrelevant to this specific condition. Looking at the options: Option 1: Mother is Rh ^ + ve (no risk). Option 2: Both parents are Rh ^ - ve , so the foetus will be Rh ^ - ve (no risk). Option 3: Mother is Rh ^ - ve and Father is Rh ^ + ve . The foetus can be