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': 'The drug NOT used for analgesia in a head injury patient is - \nSelect and explain. \nA. Morphine, B. NSAIDS, C. Rofecoxib, D. Acetaminofen', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Morphine", 'role': 'assistant'}]