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
Child survival index is calculated by 
Select and explain. 
A. 1000-IMR/100, B. IMR-1000/10, C. 1000-U5MR/10, D. U5MR-1000/10
C: 1000-U5MR/10
Answer: C: 1000-U5MR/10 
Explanation: Ref:Park's Text book of Preventive and Social Medicine 25th ed