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
[{'content': 'Test for allergic rhinitis - \nSelect and explain. \nA. CT Scan, B. X-ray, C. Nasal Smear, D. MRI', 'role': 'user'}, {'content': "Answer: C \nExplanation: 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.", 'role': 'assistant'}]