This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Medicine
A 29-year-old man with acquired immune deficiency syndrome (AIDS) comes to the emergency department because of progressively increasing abdominal discomfort. Examination shows voluntary guarding in the upper abdomen. His bio-chemistry is normal except for an elevated amylase at 370 U/L (25-125 U/L). Which of the following infections can trigger this disorder in AIDS patients? 
Select and explain. 
A. toxoplasmosis, B. Mycobacterium avium complex, C. Mycobacterium tuberculosis, D. Pneumocystis carinii
B: Mycobacterium avium complex
Answer: B: Mycobacterium avium complex 
Explanation: Pancreatitis in AIDS patients can be caused by cytomegalovirus and cryptosporidium as well as M. avium complex. Drugs are another cause of AIDS-related pancreatitis.