This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'All of the following drugs can be given in spinal, except \nSelect and explain. \nA. Morphine, B. Ketamine, C. Bupivacaine, D. Etomidate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Drug which can be given through spinal are local anaesthetics, opioids and preservative free ketamine. Injected substances Bupivacaine (Marcaine) is the local anaesthetic most commonly used, although lidocaine (lignocaine), tetracaine, procaine, ropivacaine, levobupivicaine, prilocaine, or cinchocaine may also be used. Ref Robbins 9/e pg768', 'role': 'assistant'}]