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
Lid retraction is caused by ? 
Select and explain. 
A. Bimatoprost, B. Latanoprost, C. Brimonidine, D. Apraclonidine
D: Apraclonidine
Answer: D: Apraclonidine 
Explanation: Points to remember - Apraclonidine

Sympathomimetic drug
Indication - Open-angle Glaucoma
Mechanism of action - Decrease aqueous secretion
Adverse effect - Upper lid retraction, eye allergy.