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': 'Nasopharyngeal Ca; Most common site is : \nSelect and explain. \nA. Fossa of Rosenmuller, B. Post end of septum, C. Post part of Nasal cavity close to the margin of sphenopalatine foramen., D. Lateral part of nasopharynx', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Fossa of Rosenmuller Nasopharyngeal Ca:MC type is * - Squamous cell CaLymph node involvement is very common. Sometimes a cervical node may be the only manifestation of nasopharyngeal cancer (occult primary)Treatment of choice - Radiotherapy *", 'role': 'assistant'}]