This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oesophagus, Subject name: Surgery
[{'content': 'Progressive dysphagia for solids and liquids is found in carcinoma of? \nSelect and explain. \nA. Oropharynx, B. Hypopharynx, C. Nasopharynx, D. All', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ANSWER: (B) HypopharynxREF: Harrison s 16th ed p. 217Intermittent dysphagiaProgressive dysphagia* Diffuse esophageal spasm* Ca esophagus (hypopharynx)* Pharyngeal diverticulum* Stricture* Schatzki ring* Achalasia cardia* Esophagitis', 'role': 'assistant'}]