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: Anaesthesia
True about aspiration pneumonia 
Select and explain. 
A. Affected by volume of aspiration, B. Affected by pH of aspiration fluid, C. TIncidence during induction, D. All
D: All
Answer: D: All 
Explanation: All i.e. A, B, C