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': "Welder's flash is due to - \nSelect and explain. \nA. Infrared rays, B. UV rays, C. Blue - violet light, D. All of the above", 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer- B. UV raysWelder's flash is photophthalmia or photokeratitis.", 'role': 'assistant'}]