Question

The haemolytic disease of the foetus known as erythroblastosis foetalis is caused by the:

• A. ABO Incompatibility
• B. Rh Incompatibility
• C. MNS Incompatibility
• D. Bombay blood group Incompatibility

Hint:

Rh incompatibility is the primary cause of erythroblastosis foetalis, which can be prevented by giving the mother Rh immunoglobulin during pregnancy.

Answer 1

The Correct Option is B

Erythroblastosis foetalis is a condition that occurs when there is an incompatibility between the blood types of the mother and the foetus. The most common cause is Rh incompatibility, where the mother is Rh-negative, and the foetus is Rh-positive. The mother's immune system produces antibodies against the Rh-positive blood cells of the foetus, leading to the destruction of the foetal red blood cells. This condition can lead to severe anaemia and jaundice in the newborn.
Step 1: Understanding the causes of erythroblastosis foetalis.
- ABO Incompatibility is not a common cause of erythroblastosis foetalis, though it can occur in some cases, it is usually less severe.
- Rh Incompatibility is the primary cause of erythroblastosis foetalis and occurs when the mother is Rh-negative and the foetus is Rh-positive.
- MNS Incompatibility is a rare cause and not associated with erythroblastosis foetalis.
- Bombay blood group Incompatibility is also not a common cause of this condition.
Final Answer: \[ \boxed{\text{The correct answer is (2) Rh Incompatibility.}} \]