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 circumferential clasp when used with tooth supported partial dentures: \nSelect and explain. \nA. Is usually the most logical clasp to use, B. Has good retentive and stabilizing ability, C. Both, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The circumferential clasp is usually the most logical clasp\xa0to use with all tooth-supported partial dentures, because of\xa0its retentive and stabilizing ability. \nOnly when\xa0the retentive undercut may be approached better with a bar\xa0clasp arm or when esthetics will be enhanced, should the latter be used.', 'role': 'assistant'}]