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
Which of the following statement is FALSE about Naltrexone ? 
Select and explain. 
A. Parenterally administered, B. Used to prevent relapse of heavy drinking, C. Long acting, D. Cause hepatotoxicity
A: Parenterally administered
Answer: A: Parenterally administered 
Explanation: None