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
Acute viral hepatitis  — A is diagnosed by 
Select and explain. 
A. Hepatic injury related with transaminase level, B. Variable increase in transaminase level, C. IgG anti HAV used for diagnosis, D. No rise of transaminase at all
B: Variable increase in transaminase level
Answer: B: Variable increase in transaminase level 
Explanation: None