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
Test for allergic rhinitis - 
Select and explain. 
A. CT Scan, B. X-ray, C. Nasal Smear, D. MRI
C: Nasal Smear
Answer: C: Nasal Smear 
Explanation: Ans. is 'c' i.e.. Nasal Smear o A nasal smear can sometimes be helpful for establishing the diagnosis of allergic rhinitis.o The presence of eosinophils is consistent with allergic rhinitis.