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
Morphine can be administered by all of the following routes EXCEPT: 
Select and explain. 
A. Intramuscular, B. Transdermal, C. Epidural, D. Subarachnoid
B: Transdermal
Answer: B: Transdermal 
Explanation: None