This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthesia Q Bank, Subject name: Anaesthesia
[{'content': 'You being a night duty doctor posted in surgical ward,senoir resident tells you to keep 40yr old man posted for elective cholecystectomy to be nil/oral, how many hours prior to surgery will you advised to patient to have light food ...? \nSelect and explain. \nA. 4 hours, B. 6 hours, C. 8 hours, D. 12 hours', 'role': 'user'}, {'content': "Answer: B \nExplanation: for adults 2 hours clear fluids ( defined as those fluids through which words can be read e.g water, apple juice 6 hours for solids Recommended Preoperative Fasting period for neonates and infants are 6 hours for solids/formula feeds/cow's milk 4 hours for breast milk 2 hours for clear fluids Recommended Preoperative Fasting periods for all above 1 year of age are 2 hours for clear fluids 4 hours for breast milk 6 hours for light meal 8 hours for fried, fatty food", 'role': 'assistant'}]