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: Dental
Student- test is used as 
Select and explain. 
A. Parametric test based on variance, B. Non-Parametric test based on variance, C. Parametric test based on average, D. Nun-Parametric test based on average
C: Parametric test based on average
Answer: C: Parametric test based on average 
Explanation: None