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': 'The earliest symptom of sympathetic ophthalmitis is: \nSelect and explain. \nA. Pain, B. Decreased distant vision, C. Photophobia, D. Diplopia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Photophobia', 'role': 'assistant'}]