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': 'In a removable partial denture, the clasps provide\nretention and stability; support is provided by \nSelect and explain. \nA. Minor connector, B. Occlusal rests, C. Rigid portion of the class arm, D. Resilient portion of the class arm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]