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': 'Which one of the following is NOT true with morphine? \nSelect and explain. \nA. Used in fracture of bone, B. Used in angina pectoris, C. Used in myocardial infarction, D. Not used in head injuries', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]