This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharynx, Subject name: ENT
[{'content': 'Which of the following is not included in hypopharynx? \nSelect and explain. \nA. Pyriform fossa, B. Post cricoid region, C. Anterior pharyngeal wall, D. Posterior pharyngeal wall', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (c) Anterior pharyngeal wall(Ref. Scott Brown, Vol 3; 743)Anterior pharyngeal wall is no entity. Anterior to the hypopharynx is the larynx. Anterior to the nasopharynx and oropharynx are nasal and oral cavities respectively.', 'role': 'assistant'}]