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: Social & Preventive Medicine
[{'content': 'Iron requirment in a normal mensturating adult female \nSelect and explain. \nA. 15 mg/day, B. 20 mg/day, C. 30 mg/day, D. 35 mg/day', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 20 mg/day", 'role': 'assistant'}]