Materials used for injection thyroplasty are: (A) Collagen, (B) Acellular micronized human dermis, (C) Gelatin powder, (D) All the above
Answer is D. Injection of vocal cord with Teflon paste or gelfoam to augment and medialize the paralyzed cord so that the opposite healthy cord can easily approximate Ref: PL Dhingra Textbook of Ear, Nose and Throat, Edition 6, page - 301