A 21 yrs 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 degree C and vomittings before coming Most probable dx is:

• A. Acute appendicitis
• B. Acute cholecystitis
• C. Acute diverticulitis
• D. Acute pancreatitis