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': 'Lid retraction is caused by ? \nSelect and explain. \nA. Bimatoprost, B. Latanoprost, C. Brimonidine, D. Apraclonidine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Points to remember - Apraclonidine\n\nSympathomimetic drug\nIndication - Open-angle Glaucoma\nMechanism of action - Decrease aqueous secretion\nAdverse effect - Upper lid retraction, eye allergy.', 'role': 'assistant'}]