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: Dental
[{'content': 'Electric pulp test: \nSelect and explain. \nA. Requires more current for anterior teeth, B. Requires more current for posterior teeth, C. Same response, D. Better in inflamed teeth', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]