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: Dental
[{'content': 'Woods lamp has a frequency of – \nSelect and explain. \nA. 250 nm, B. 300 nm, C. 320 nm, D. 360 nm', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The filter of wood lamp allows only certain wavelengths of UV rays (365 nm) to filter through', 'role': 'assistant'}]