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 minor connector Leaves the major connector: \nSelect and explain. \nA. gradually, B. abruptly, C. covering large area, D. without any relief', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]