This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
If we reject null hypothesis, when actually it si true it is known as- 
Select and explain. 
A. Type I error, B. Type II error, C. Power, D. Specificity
A: Type I error
Answer: A: Type I error 
Explanation: <p> Type 1 error. Reference:Simple Biostatistics by Indeayan & Indrayan,1st edition,pg no:155-57. <\p>