Causes of Hydrops fetalis:

Ans. (A) Parvovirus(Ref: William's Obstetrics 25th Ed; Page No 309)Parvovirus B19 is the most common infectious cause of hydrops fetalis.Parvovirus B19 infects fetal erythroid progenitor cells and cause anemia.Severe anemia leads to high-output cardiac failure and hydrops fetalis.