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 statement is FALSE about Naltrexone ? \nSelect and explain. \nA. Parenterally administered, B. Used to prevent relapse of heavy drinking, C. Long acting, D. Cause hepatotoxicity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]