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: Anaesthesia
[{'content': 'Breast milk should be discontinued for how long prior to surgery \nSelect and explain. \nA. 8 hours, B. 6 hours, C. 4 hours, D. 2 hours', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Breast milk should not be consumed within 4 hours prior to surgery.', 'role': 'assistant'}]