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
[{'content': 'Most common site of pancreatic cancer is - \nSelect and explain. \nA. Head of pancreas, B. Neck of Pancreas, C. Tail of Pancreas, D. Body of pancreas', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Head of pancreas o Pancreatic cancer has a very bad prognosis - with a 5-year survival of only 5%.o Only possible effective t/t is complete surgical resection.o Such curative resection is possible only in 10-15% of patients (usually those individuals with a tumor in the pancreatic head) The 5 year survival rate following such resection is only 10%", 'role': 'assistant'}]