This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Hydrops foetalis is seen in following except : 
Select and explain. 
A. Rh incompatibility, B. Syphilis, C. ABO incompatibility, D. CMV
C: ABO incompatibility
Answer: C: ABO incompatibility 
Explanation: Ans. is c i.e. ABO incompatibility