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 21yrs. old pt. attended a party the previous night and gives the following symptoms - pain in abdomen radiating to back, pulse 100/min, BP 100/76 temp 39°C and vomiting before coming Most probable dx is : 
Select and explain. 
A. Acute appendicitis, B. Acute cholecystitis, C. Acute diverticulitis, D. Acute pancreatitis
D: Acute pancreatitis
Answer: D: Acute pancreatitis 
Explanation: None