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': 'Which part of the distal extension removable partial denture provides the greatest resistance to movement and torquing of the abutment teeth? \nSelect and explain. \nA. Rest, B. Base, C. Retentive clasp, D. Minor connector', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]