<prompt> In a completely charred body at autopsy, medical officer can say that the burns are antemortem if he can find -Soot in respiratory passageCyanosis of finger nailsCongestion of kidneyPale internal organs  <response>: 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. 