This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous ENT, Subject name: ENT
[{'content': 'Tornwaldt cyst is \nSelect and explain. \nA. Laryngeal cyst, B. Nasopharyngeal cyst, C. Ear cyst, D. None', 'role': 'user'}, {'content': "Answer: B \nExplanation: Thornwaldt's disease or Pharyngeal bursitis is an infection of pharyngeal bursa located in the midline of the posterior wall of the nasopharynx. Ref: Textbook of ENT, Dhingra; 6th edition; Pg no: 245 ref img", 'role': 'assistant'}]