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
In a ceain population, there were 4050 bihs in last one year. There were 50 still bihs. 50 infants died within 7 days where as 150 died within 28 days. What is the neonatal moality rate- 
Select and explain. 
A. 50, B. 62.5, C. 12.5, D. 49.4
A: 50
Answer: A: 50 
Explanation: Ans. is 'a' i.e., 50 Neonatal deaths are deaths occurring during the neonatal period, commencing at bih and ending 28 completed days after bih. Neonatal moality rate is the number of neonatal deaths in a given year per 1000 live bihs in that year.