This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Gynaecology & Obstetrics
Virus responsible for non immune hydrops foetalis is? 
Select and explain. 
A. Cytomegalovirus, B. Herpes simplex virus, C. Hepatitis B virus, D. Parvovirus
D: Parvovirus
Answer: D: Parvovirus 
Explanation: Parvovirus is the commonest infectious etiology for hydrops foetalis. The other viruses implicated include Cytomegalovirus, Hepatitis B virus, Herpes simplex virus, Rubella virus and Adenovirus. Ref : Dutta book of obstetrics 8th Ed