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
A patient is admitted with severe pain in the abdomen, nausea, vomiting and fever. The mostlikely diagnosis is - 
Select and explain. 
A. Perforated peptic ulcer, B. Intestinal obstruction, C. Acute pancreatitis, D. Acute cholecystitis
C: Acute pancreatitis
Answer: C: Acute pancreatitis 
Explanation: Ans. is 'c' i.e., Acute Pancreatitis