<prompt> Which of the following is precancerous lesion?Pachydermia of larynxLaryngitis siccaKeratosis of larynxScleroma larynx  <response>: Keratosis of larynxleukoplakia:? It is epithelial hyperplasia of the upper surface of one or both vocal cords. Appears as a white plaque or way growth on cord without affecting its mobility Regarded as a precarcerous condition as Ca in situ develops frequently Ttstripping of cords 