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
Nitroglycerine can be administered by all of the following routes except: 
Select and explain. 
A. Oral, B. Sublingual, C. Intramuscular, D. Intravenous
C: Intramuscular
Answer: C: Intramuscular 
Explanation: None