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: Radiology
[{'content': 'X-rays were discovered in the year: \nSelect and explain. \nA. 1892, B. 1895, C. 1896, D. 1890', 'role': 'user'}, {'content': 'Answer: B \nExplanation: X-rays were discovered on 8th November, 1895.', 'role': 'assistant'}]