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': 'Denominator for calculating infant moality rate is: September 2005 \nSelect and explain. \nA. 1000 population, B. 1000 bihs, C. 1000 live bihs, D. 1000 pregnancies', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: 1000 live bihs IMR = Number of deaths of children less than 1 year of age in a year X 1000/number of live bihs in the same year IMR is universally regarded a s not only as a most impoant indicator of the health status of a community but also the level of living of people in general, and effectiveness of MCH services in paicular. It is expressed as a rate per 1000 live bihs.', 'role': 'assistant'}]