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
Transdermal patch is not used for following drug? 
Select and explain. 
A. GTN, B. Fentanyl, C. Nicotine, D. Naloxone
D: Naloxone
Answer: D: Naloxone 
Explanation: Ans. is `d' i.e., Naloxone