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: Unknown
Pain rating index is presided by- 
Select and explain. 
A. Faces scale, B. Visual analogue scale, C. Mc Gill questionnaire, D. CHEOP scale
C: Mc Gill questionnaire
Answer: C: Mc Gill questionnaire 
Explanation: Ans-C