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: ENT
[{'content': 'Injection laryngoplasty uses: \nSelect and explain. \nA. Fat, B. Gelfoam, C. Calcium hydroxyapatite, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Injection laryngoplasty uses calcium hydroxylapatite, absorbable gelatin paste (ie, Gelfoam paste), Bioplastique, or fat. The substance is injected laterally into the vocal fold to displace it medially. The use of calcium hydroxylapatite in this context is a recent development and appears to generate minimal tissue reaction and produce a long-lasting result.', 'role': 'assistant'}]