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': 'Embrasure clasp are usually used in cases of \nSelect and explain. \nA. Class I cases with modifications, B. Class II cases with modifications, C. Class III cases without modifications, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In the fabrication of an unmodified Class II or Class III partial denture, there are no edentulous spaces on the opposite side of the arch to aid in clasping. Mechanically, this is a disadvantage. However, when the teeth are sound and retentive areas are available or when multiple restorations are justified, clasping can be accomplished by means of an embrasure clasp.', 'role': 'assistant'}]