This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rhinitis, Subject name: ENT
[{'content': 'Charcot leyden crystal seen in? \nSelect and explain. \nA. Allergic rhinitis, B. Acute sinusitis, C. Nasal polyp, D. Acute tonsillitis', 'role': 'user'}, {'content': "Answer: A \nExplanation: ANSWER: (A) Allergic rhinitisREF: Harrison's 18th ed chapter 60Repeat 2012 Session I (Microbiology)Charcot leyden crystals are derived from eosinophils . They are indicative of a disease involving eosinophilic inflammation or proliferation, such as is found in allergic reactions and parasitic infections. Charcot-Leyden crystals are often seen pathologically in patients with bronchial asthma.Charcot Leyden crystal is seen in:Bronchial asthmaAmoebic dysentery (in stool)Allergic rhinitiasAllergic fungal sinusitis (AFS)Allergic bronchopulmonary mycosis (ABPM)", 'role': 'assistant'}]