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': 'The denominator of general feility rate is: \nSelect and explain. \nA. Midyear population of women of 1544 years of age, B. Total year population of women of reproductive age group, C. Average population of women in a year, D. Any of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Midyear population of women of 1544 years of age', 'role': 'assistant'}]