Location of pyriform fossa: (A) Nasopharynx, (B) Oropharynx, (C) Laryngeal pa of pharynx, (D) None
Answer is C. Pyriform fossa lies between quadrate membrane and medial side of thyroid cailage. It is transversed by internal laryngeal nerve.The pyriform fossa is separated from vallecula by lateral folds of the tongue. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3.