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': 'Most common ocular involvement in sarcoidosis is \nSelect and explain. \nA. Iritis, B. Keratitis, C. Cataract, D. Glaucoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: M/C - Iritis.', 'role': 'assistant'}]