This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Census, SRS, NFHS, DLHS, VRS, Subject name: Social & Preventive Medicine
[{'content': "'Mid-year population' is not the denominator of which moality rate? \nSelect and explain. \nA. Crude death rate, B. Crude bih rate, C. Weekly death rate, D. Propoional moality rate", 'role': 'user'}, {'content': 'Answer: D \nExplanation: In propoional moality rate, the denominator is the total number of deaths due to all causes', 'role': 'assistant'}]