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: Pediatrics
Hydrops fetalis may be caused by the following, except? 
Select and explain. 
A. Congenital hea block, B. Cystic hygroma, C. Congenital varicella syndrome, D. Congenital nephrosis
C: Congenital varicella syndrome
Answer: C: Congenital varicella syndrome 
Explanation: Ans. is 'c' i.e., Congenital varicella syndrome