This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and PNS, Subject name: ENT
A 5-year-old child with recurrent sinusitis, cause is: 
Select and explain. 
A. Adenoids, B. Angiofibroma, C. Nasal carcinoma, D. All of the above
A: Adenoids
Answer: A: Adenoids 
Explanation: (a) Adenoids(Ref. Scott Brown, Vol 2; 286)Because of nasal obstruction the child can have recurrent sinusitis. Angiofibroma and nasopharyngeal carcinoma are not seen at this age.