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
[{'content': 'Nitroglycerine can be administered by all of the following routes except: \nSelect and explain. \nA. Oral, B. Sublingual, C. Intramuscular, D. Intravenous', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]