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
Denominator of infant moality rate is ? 
Select and explain. 
A. Per live bih, B. Per 100 live bihs, C. Per 1000 live bihs, D. Per lakh live bihs
C: Per 1000 live bihs
Answer: C: Per 1000 live bihs 
Explanation: Infant moality rate is no.of deaths of children less than 1year of age in a year divided by no.of live bihs in the same year.REF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-523