This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hyper Pigmented Disorders, Subject name: Dental
[{'content': 'Slate-like discoloration of skin? \nSelect and explain. \nA. Amiodarone, B. Minocycline, C. Hydroxyurea, D. Clofazimine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Minocycline = blue-black pigmentation (Slate like)', 'role': 'assistant'}]