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
What will be the 95% confidence interval (CI) for an estimated prevalence of 10% and a sample size of 100? 
Select and explain. 
A. 18-Feb, B. 16-Apr, C. 13-Jul, D. Given data inadequate for calculation of class intervals.
B: 16-Apr
Answer: B: 16-Apr 
Explanation: Ans: B. 4-16