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
Aspartate aminotransferase is released 
Select and explain. 
A. by viable cells, B. after cell necrosis, C. either of the two, D. none of the above
B: after cell necrosis
Answer: B: after cell necrosis 
Explanation: None