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': 'Maximal reduction in gastric acidity is achieved by ? \nSelect and explain. \nA. Truncal vagotomy and pyloroplasty, B. Truncal vagotomy and antrectomy, C. Paial gastrectomy, D. Highly selective vagotomy', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Truncal vagotomy and antrectomy", 'role': 'assistant'}]