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: Pharmacology
[{'content': 'An 76 year lady had a history of a red facial rash suffered venous eczema of legs. She was treated for acne rosacea by her GP. On examination, she had bluish pigmentation on both the legs. What drug is likely to have caused this? \nSelect and explain. \nA. Amiodarone, B. Hydroxychloroquine, C. Minicycline, D. Amocycillin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans:C.)Minocycline', 'role': 'assistant'}]