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': 'Which of the following estimating the burden of a disease in the community is- \nSelect and explain. \nA. Disease specific mortality, B. Proportional mortality rate, C. Maternal mortality rate, D. Child mortality rate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]