This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and family planning, Subject name: Social & Preventive Medicine
The number of aboions performed divided by the number of live bihs in the same period is known as 
Select and explain. 
A. Aboion rate, B. Aboion incidence, C. Aboion prevalence, D. Aboion ratio
D: Aboion ratio
Answer: D: Aboion ratio 
Explanation: Aboion ratio is calculated by dividing the number of aboions performed during a paicular time period by the number of live bihs over the same period Reference : Park&;s textbook of preventive and social medicine, 23rd edition, Page no: 489