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: Medicine
[{'content': 'A 50-year old male has had precardial pain for four hours. On examination, his BP is 110/80 mm g. pulse is 120 beats /min. and respiratory rate is 26/min. His ECG shows marked S-T segment elevation in leads V3-V6 and left ventricualr ectopics. The initial therapuetic modalities in this case would include - \nSelect and explain. \nA. Lignocaine and streptokinase, B. Streptokinase and morphine, C. Morphine and doubtamine, D. Lignocaine, streptokinase and morphine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]