This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': "Curshmann's crystals are seen in - \nSelect and explain. \nA. Bronchial asthma, B. Bronchiectasis, C. Chronic bronchitis, D. Wegners granulomatosis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Bronchial asthma Pathology of AsthmaGross -o Lungs are overdistended because of overinflation and there may be small area of atelactasis.o The most striking macroscopic finding is occlusion of bronchi and bronchioles by thick tenacious mucus plugs.Histology -o Characterized by presence of numerous eosinophils and neutrophils.Curschman spiral - Whorls of shed epithelium in mucus plugs.Charcot -leyden crystals - Collection of crystalloids made up of eosinophilic membrane protein.The other characteristic histological finding of Asthma is collectively called Airway remodelling, it includes -o Thickening of the basement membrane of the bronchial epithelium.o Edema and an inflammatory infiltrate in the bronchial walls with a prominence of eosinophils and mast cells,o An increase in the size of submucosal glands,o Hypertrophy of bronchial wall muscle.The "airway remodelling" contributes to airflow obstruction.', 'role': 'assistant'}]