This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Obstructive Lung Diseases, Subject name: Pathology
[{'content': 'Charcot laden crystals are found 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 o Characteristic histological findings and sputum findings in asthma are1) Curschmann's spirals: Whorls of shed epithelium in mucus plug.2) Charcot-leyden crystals: Collection of crystalloids made up of eosinophilic protein.3) Creola bodies: Ciliated columnar cells sloughed from bronchial mucosa.", 'role': 'assistant'}]