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: Surgery
[{'content': 'With over dosage of L.A agent, one would observe \nSelect and explain. \nA. Hypertension, B. Hypotension, C. No change in BP, D. Cardiac arrhythmias', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]