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: Pharmacology
[{'content': 'Which of the following antiglaucoma drug can cause stenosis of nasolacrimal duct \nSelect and explain. \nA. Timolol, B. Apraclonidine, C. Latanoprost, D. Adrenaline', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Timolol caused stenosis of nasolacrimal duct & obstructs the drainage leading to maximum systemic absorption of drug.\nApracloinidine: Lid retraction.\nAdrenaline: Conjuctival pigmentation.\nLatanoprost: Iris pigmentation, growth of eyelashes.', 'role': 'assistant'}]