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: Skin
[{'content': 'Uses of woods light includes : \nSelect and explain. \nA. Urine examination in porphyria, B. Examination of hair in T. capitis, C. Selerema, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. All', 'role': 'assistant'}]