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 testing stimulates: \nSelect and explain. \nA. A delta monopolar nerve fibers., B. A delta bi polar nerve fibers., C. Both, D. C fibres', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In Electric pulp testing both the fibers are stimulated but bipolar are better and more efficient.', 'role': 'assistant'}]