This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Adenoids, Subject name: ENT
[{'content': 'Speech problem after adenoidectomy is due to- \nSelect and explain. \nA. Trauma to larynx, B. Velopharyngeal insufficiency, C. Trauma to vocal cord, D. Trauma to superior constrictor', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Velopharyngeal insufficiency o Velopharyngeal insufficiency may occur after adenoidectomyo This causes hypernasality of voice.o It is due to incomplete closure of nasopharynx - abnormal physiological separation of oropharynx from nasopharynx", 'role': 'assistant'}]