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': 'Lisch nodule is seen in – \nSelect and explain. \nA. Von recklinghausens disease, B. Lupus vulgaris, C. Leprosy, D. LGV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lisch nodules are hamartomas, located within the iris. They are characteristic of neurofibromatosis-1.', 'role': 'assistant'}]