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': 'The control teeth used during pulp testing are \nSelect and explain. \nA. Adjacent and opposing teeth, B. Adjacent and contra lateral teeth, C. Suspected tooth only, D. Adjacent teeth only', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]