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
[{'content': 'Total gastrectomy is preferred for which type of gastric cancers \nSelect and explain. \nA. Proximal Cancer, B. Distal Cancer, C. Ulcerating cancer in the body, D. Polypoidal cancer in the antrum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Proximal CancerFor proximal gastric carcinomaFor extensive tumors (eg. Linitis plastica)To obtain negative margins for distal gastric carcinoma', 'role': 'assistant'}]