This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Pediatrics
[{'content': 'Expressed breast milk can be stored in a refrigerator for how many hours? \nSelect and explain. \nA. 6, B. 10, C. 18, D. 24', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. 24If the mother is not in a position to feed the baby (ill, working mother or preterm baby), she can express her milk in a clean wide mouth container and this milk can be fed to the baby. Expressed breast milk can be stored at room temperature for 6 - 8 hours, in a refrigerator for 24 hours and in a freezer at -20degC for 3 months', 'role': 'assistant'}]