This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Adenoids are also called? \nSelect and explain. \nA. Nasopharyngeal tonsils, B. Palatine tonsils, C. Faucial tonsils, D. Lingual tonsils', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Nasopharyngeal tonsils o Adenoids, also known as nasopharyngeal tonsils, are subepithelial collection of lymphoid tissue at the junction of roof and posterior wall of nasopharynx,o Adenoids act as a barrier to infection,o Adenoids are subjected to physiological enlargement.o They are present at birth, enlarge upto 6 years of age and then atrophy and completely disappear by 20 years of age.o Upper respiratory' tract infections (Rhinitis, sinusitis, tonsillitis) and allergies can cause adenoid hypertrophy.", 'role': 'assistant'}]