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: Radiology
35-year-old c/o fever, severe abdominal pain in epigastrium radiating to the back with a h/o binge drinking. Pulse is 120 bpm, BP is 90/60 mm Hg. CT Abdomen (P+C) was done. Most likely diagnosis is(AIIMS 2016) 
Select and explain. 
A. Peptic ulcer, B. Acute pancreatitis, C. Chronic calcific pancreatitis, D. Acute cholecystitis
B: Acute pancreatitis
Answer: B: Acute pancreatitis 
Explanation: Ans. B Acute pancreatitisObserve a bulky pancreas with fuzzy margins and adjacent fat stranding - s/o Acute pancreatitis. CE-CT scan is IOC. Balthazar grading systemQ and CT Severity Index (CTSI)Q are used for prognosis.