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
Nonlmmune hydrops foetalis is seen In all except: 
Select and explain. 
A. b - Thalassemia, B. Parvovirus-19, C. Rh-incompatibility, D. Chromosomal anomaly
C: Rh-incompatibility
Answer: C: Rh-incompatibility 
Explanation: Rh-incompatibility