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
Slate-like discoloration of skin? 
Select and explain. 
A. Amiodarone, B. Minocycline, C. Hydroxyurea, D. Clofazimine
B: Minocycline
Answer: B: Minocycline 
Explanation: Minocycline = blue-black pigmentation (Slate like)