This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'The denominator in General feility rate \nSelect and explain. \nA. Live bihs, B. Mid year population, C. Reproductive women in the age group 15-45 mid year population, D. Married women in the age group 15-45', 'role': 'user'}, {'content': "Answer: C \nExplanation: General feility rate (GFR) : Number of live bihs per 1000 women in the reproductive age group 15-49 years in a given year Denominator : Takes 'mid-year population' of 15-49 years age females into account Ref: Park 25th edition Pgno : 539", 'role': 'assistant'}]