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
Power of a study can be increased by- 
Select and explain. 
A. Increasing a error, B. Decreasing ss error, C. Decreasing a error, D. Increasing ss error
B: Decreasing ss error
Answer: B: Decreasing ss error 
Explanation: <p> Decreasing ss error. Reference:Simple Biostatistics by Indrayan & Indrayan,1stbedition,page no: <\p>