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
In pylorus, Pancreatoduodenectomy preserving following is not resected 
Select and explain. 
A. Pyloric antrum, B. CBD, C. Duodenum, D. None
A: Pyloric antrum
Answer: A: Pyloric antrum 
Explanation: Answer- A. Pyloric antrumThe standard resection for a tumour of the pancreatic head or the ampulla is a pylorus-preserving pancreatoduodenectomy (PPPD).