This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'Morphine can administered by all of the following routes except: \nSelect and explain. \nA. Intramuscular, B. Transdermal, C. Epidural, D. Subarachnoid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ref: KDT 6/e p458 *Respiratory depression occurs due to depression of respiratory centre by morphine travelling through the subarachnoid space Routes of administration of morphine are: -Oral -Rectal -Intramuscular -Intravenous -Transdermal -Subcutaneous', 'role': 'assistant'}]