This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Gynaecology & Obstetrics
Feature of hydrops fetalis in a fetus can be due to: 
Select and explain. 
A. Ebstein barr virus, B. Human papilloma virus, C. Parvovirus B19, D. Influenza Virus
C: Parvovirus B19
Answer: C: Parvovirus B19 
Explanation: Hydrops fetalis - Excessive destruction of the fetal red cells leads to severe anemia, tissue anoxemia and metabolic acidosis It is accumulation of fluid in the body of the fetus in two out of three compaments: ascites, pleural effusion, pericardial effusion Most common cause of immune hydrops fetalis - Rh incompatibility Others causes of hydrops fetalis Cardio vascular cause - congenital hea block ( Most common) Chromosomal cause - turner syndrome (45 XO ), triploidy , trisomies 21,18 and 13 Hematological - a 4 - thalassemia (HB bas) , fetomaternal hemorrhage Infections - Parvovirus B19(mc) , syphilis , cytomegalovirus, toxoplasmosis Rubella, HSV