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: Surgery
Chronic alcoholic comes with pain epigastrium and recurrent vomiting. On examination guarding in upper epigastrium. Chest X-ray normal. What to do next? 
Select and explain. 
A. UGI endoscopy, B. Serum lipase, C. CECT, D. Alcohol breath test
B: Serum lipase
Answer: B: Serum lipase 
Explanation: Answer- B. Serum lipaseSerum amylase and lipases are the initial investigations done in patients with acute pancreatitis.CECT is the investigation of choice but the initial investigation in such patients.