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': 'In a highly selective vagotomy, the vagal supply is severed to - \nSelect and explain. \nA. Antrum, B. Proximal two-thirds of stomach, C. Pylorus, D. Whole of stomach', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]