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: ENT
[{'content': 'Pitch discrimination is best between ? \nSelect and explain. \nA. 0-100 Hz, B. 100-1000 Hz, C. 1000-4000 Hz, D. 20-20,000 Hz', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is'b'i.e., 100-1000 HzRef Dhingra p. 18-20", 'role': 'assistant'}]