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': 'Hypopigmented patches present in – \nSelect and explain. \nA. Nevus Ota, B. Nevus Ito, C. Nevus anemicus, D. Becker nevus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]