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
Charcot laden crystals are found in - 
Select and explain. 
A. Bronchial asthma, B. Bronchiectasis, C. Chronic bronchitis, D. Wegners granulomatosis
A: Bronchial asthma
Answer: A: Bronchial asthma 
Explanation: 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.