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': 'Children borne by female at the end of reproductive period is \nSelect and explain. \nA. NRR, B. TFR, C. CBR, D. GFR', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]