This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sampling, Subject name: Social & Preventive Medicine
Which of the following is true abut Simple Random Sampling? 
Select and explain. 
A. Less number of samples is collected, B. Every person has an equal chance of selection, C. Groups are not equally distributed, D. Also known as Systematic randomization
B: Every person has an equal chance of selection
Answer: B: Every person has an equal chance of selection 
Explanation: Simple random sampling:- Every unit of population has equal chance of being selected. Applicable for small, homogenous and readily available populations. Methods of simple random sampling:- 1) Lottery method 2) Random number tables 3) Computer software 4) Currency notes method.