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
[{'content': 'In a hypeensive patient with glaucoma which of the following is not used: \nSelect and explain. \nA. Dipivefrine, B. Alpha blocker, C. Alpha agonist, D. Laser trabeculoplasty', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Dipivefrine', 'role': 'assistant'}]