This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
[{'content': 'Which of the following causes least increase in IOP? \nSelect and explain. \nA. Flouromethalone, B. Triamicinolone, C. Dexamethasone, D. Hydrocortisone', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) FlouromethaloneRef: American Academy of Ophthalmology, BSCS, Section 9, p. 186Rimexolone, Loteprednol & fluorometholone have less potential to elevate IOP.', 'role': 'assistant'}]