<prompt> Best prognosis is seen in -Ca lipCa tongueCa palateCa floor of mouth  <response>: Carcinoma of oral cavity Most common type of Carcinoma of oral cavity is squamous cell carcinomaIn the oral Cavity, tongue 30 is the most common site followed by lip 17.4 and the floor of mouth 16.4The mortality from squamous Carcinoma also varies by site in the mouth, with the lowest mortality from lip Cancer and the highest for Cancer of the Tongue. 