This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Definition & Concepts, Subject name: Social & Preventive Medicine
[{'content': 'In child woman ratio, number of 0-4 years aged children are expressed: \nSelect and explain. \nA. Per 1000 women, B. Per 1000 women in reproductive age group (15-49 years), C. Per 1000 married women in reproductive age group, D. Per 1000 married women in post - reproductive age group', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Child woman ratio: Is number of 0-4 years aged children expressed per 1000 women in reproductive age group. (15 - 49 years) OTHER IMPOANT PARAMETERS: GFR :- x1000. DR :- / .', 'role': 'assistant'}]