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: Ophthalmology
In a patient predisposed to glaucoma, the drug contraindicated is: 
Select and explain. 
A. Pilocarpine, B. Ecothiopate, C. Timolol, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: Ans. None of the above