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': 'A young boy has a single scaly, hypo anaesthetic patch over Hand plus thickened ulnar nerve, diagnosis is: \nSelect and explain. \nA. Tuberculoid leprosy, B. Lepromatous leprosy, C. Indeterminate, D. Borderline', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tuberculoid leprosy', 'role': 'assistant'}]