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: Medicine
Which hepatitis virus has worst prognosis in pregnancy : 
Select and explain. 
A. HBV, B. HCV, C. HEV, D. HAV
C: HEV
Answer: C: HEV 
Explanation: Answer is C (HEV)