This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and family planning, Subject name: Social & Preventive Medicine
[{'content': 'Denominator in general feility rate is \nSelect and explain. \nA. All women between 15-45 years of age, B. All married women between 15-45 years of age, C. Total number of live bihs, D. Total number of all bihs', 'role': 'user'}, {'content': 'Answer: A \nExplanation: General Feility Rate This measure addresses the crude nature of the Crude Bih Rate by focusing on that section of the population at risk of having bihs - Women aged 15-45years Reference : Park&;s textbook of preventive and social medicine, 23rd edition', 'role': 'assistant'}]