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
In a statistical study for calculating the effect of drug on patient's sugar level the test showed significant difference when in reality there was no difference 
Select and explain. 
A. Alpha error, B. Beta error, C. Gamma error, D. Power of a test
A: Alpha error
Answer: A: Alpha error 
Explanation: Ref:Park's Textbook of Preventive and Social Medicine 25th Ed