This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Obstetric Care in RCH: Visits, IFA, TT, MCH Indicators, Subject name: Social & Preventive Medicine
In a town of 20,000 population, total 456 bihs were there in a year out of which 56 were dead born. The total deaths were 247 out of which 56 deaths were within the first 28 days of life and another 34 had died after 28 days and before completing the first bihday. Calculate the Infant moality rate of this area. 
Select and explain. 
A. 197, B. 225, C. 392, D. 344
B: 225
Answer: B: 225 
Explanation: IMR= No. of deaths of children less than 1 year of age in a year x 1000 --------------------------------------------------------------------------------------- Number of live bihs in the same year = 56+34/ 456-56 x 1000 = 90/400 x 1000 =225