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
Calculate the neonatal moality rate for a population according to the data of 2012. Number of neonatal deaths- 450, number of stillbihs-212, total number of live bihs-12,450. 
Select and explain. 
A. 36, B. 15, C. 90, D. 56
A: 36
Answer: A: 36 
Explanation: Ans. a. 36Neonatal moality rate=Number of deaths of children under 28 years of age in a year (neonatal deaths) x 1000/ Total live bihs in the same year450 x 1000/ 12450= 36 per 1000 live bihs