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: Physiology
[{'content': 'Physiological gastrectomy is: \nSelect and explain. \nA. Ligate all major aeries, B. Antrectomy, C. Upper 1/3 of stoma resected, D. Ligation of 4-out of five aeries', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Ligate all major aeries', 'role': 'assistant'}]