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: Forensic Medicine
In a completely charred body at autopsy, medical officer can say that the burns are antemortem if he can find - 
Select and explain. 
A. Soot in respiratory passage, B. Cyanosis of finger nails, C. Congestion of kidney, D. Pale internal organs
A: Soot in respiratory passage
Answer: A: Soot in respiratory passage 
Explanation: One of the most important characteristic of antemortenri burns is, the finding of 'Soot and carbon particles' in larynx, trachea and may be in lungs.