This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: obstetrics,pediatrics and geriatrics, Subject name: Social & Preventive Medicine
MMR is expressed as a rate per 
Select and explain. 
A. 100 live bihs, B. 1000 live bihs, C. 10000 live bihs, D. 100000 live bihs
D: 100000 live bihs
Answer: D: 100000 live bihs 
Explanation: Ref:Park's Text book of Preventive and Social Medicine 25th ed