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
Progressive dysphagia for solids and liquids is found in carcinoma of? 
Select and explain. 
A. Oropharynx, B. Hypopharynx, C. Nasopharynx, D. All
B: Hypopharynx
Answer: B: Hypopharynx 
Explanation: 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