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
Denominator of MMR if MMR is expressed as 167 is:- 
Select and explain. 
A. 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
A: Per 100000 live births
Answer: A: Per 100000 live births 
Explanation: 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.