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': 'Which of the following drugs is contraindicated in liver dysfunction? \nSelect and explain. \nA. Pefloxacin, B. Vancomycin, C. Amikacin, D. Hydralazine', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Pefloxacin", 'role': 'assistant'}]