This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pathophysiology - Neoplasms, Subject name: Surgery
All are resected in whipples operation except: 
Select and explain. 
A. Duodenum, B. Head of pancreas, C. Portal vein, D. Common bile duct
C: Portal vein
Answer: C: Portal vein 
Explanation: Ans is 'c' ie Portal vein Whipple's operation (Pancreaticoduodenectomy)is the most commonly performed operation for carcinoma of head of pancreas.It includes resection of: distal stomach - duodenumgall bladder - proximal jejunumCBD - regional lymphatics head of pancreasRestoration of gastrointestinal continuity requiresPancreaticojejunostomy choledochojejunostomy &. Gastrojejunostomy