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': 'Pain of cracked tooth syndrome is differentiated by \nSelect and explain. \nA. Pain on biting, B. Pain on release of bite pressure, C. Continuous pain, D. Decrease threshold for pain', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]