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: Anaesthesia
Which of the following drug can be given intravenously,epidurallyor by transdermal route 
Select and explain. 
A. Thiopentone, B. Succinylcholine, C. Vecuronium, D. Fentanyl
D: Fentanyl
Answer: D: Fentanyl 
Explanation: None