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
The number of abortions performed divided by the number of live births in the same period is known as- 
Select and explain. 
A. Abortion rate, B. Abortion incidence, C. Abortion prevalence, D. abortion ratio
D: abortion ratio
Answer: D: abortion ratio 
Explanation: Abortion ratio 

This is calculated by dividing the number of abortions performed during a particular time period by the number of live births over the same period.