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: Medicine
All of the following is used for gradation of coma in Glasgow coma scale except- 
Select and explain. 
A. Eye opening, B. Motor response, C. Verbal response, D. Bladder function
D: Bladder function
Answer: D: Bladder function 
Explanation: None