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: Pediatrics
[{'content': 'Expresses breast milk can be stored in refrigerator, for how many hours: September 2011 \nSelect and explain. \nA. 12 hours, B. 24 hours, C. 36 hours, D. 48 hours', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: 24 hours Expressed breast milk can be stored at room temperature for 6-8 hours, in a refrigerator for 24 hours and a freezer at -20 degree C for 3 months', 'role': 'assistant'}]