This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Definitions & Concepts, Subject name: Social & Preventive Medicine
In a population of 1000, there are 200 eligible couples. 30 out of them use condom, 20 use IUCD, 20 use OC pills while 70 have undergone female sterilization. The rest do not use any method. Calculate Couple protection rate. 
Select and explain. 
A. 35%, B. 55%, C. 62%, D. 70%
D: 70%
Answer: D: 70% 
Explanation: - Given, total eligible couples = 200 ; eligible couples protected by any of approved methods = 30+20+20+70 =140 - CPR = Total no. of eligible couples protected by any of approved methods/Total no. of eligible couples in the communityx100 =140/200 = 70% Approved methods of Family planning Sterlization IUD Condom Oral pills