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: Pathology
Sputum from an asthma patient may show ? 
Select and explain. 
A. Numerous eosinophils, B. Curschmann's spirals, C. Charcot-Leyden crystals, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is 'd' i.e., All of the above