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: Surgery
Which of the following is not a component of Glasgow Coma Scale? 
Select and explain. 
A. Eye opening, B. Motor response, C. Pupil size, D. Verbal response
C: Pupil size
Answer: C: Pupil size 
Explanation: Ans. is 'c' i.e. pupil size