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: Medicine
Commonest sign of aspiration pneumonitis is : 
Select and explain. 
A. Cyanosis, B. Tachypnea, C. Crepitations, D. Rhonchi
B: Tachypnea
Answer: B: Tachypnea 
Explanation: Answer is B (Tachyapnea): Aspiration pneumonitis is characterized by an acute onset of dyspnea, tachypnea, bronchospasm and cyanosis with a chest radiograph often showing diffuse opacities. - Harrisons Dyspnea tachypnea are ceainly the earliest manifestations to appear following aspiration of any material. The commonest and the earliest 'sign' of aspiration pneumonitis thus would be tachypnea.