This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Obstetrics, Subject name: Social & Preventive Medicine
[{'content': 'Denominator of MMR if MMR is expressed as 167 is:- \nSelect and explain. \nA. Per 100000 live births, B. Per 1000 total birth, C. Per 10000 total birth, D. Total number of women of reproductive age group in the population', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. 1000 live births It's a ratio: Denominator is Per 100000 live births. It will be rate : if the denominator is reproductive women. But still some books write it as rate. But in Park it's clearly differentiated. The data we express MMR as 167 is a ratio.", 'role': 'assistant'}]