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: ENT
Which ca has the best prognosis - 
Select and explain. 
A. Carcinoma Lip, B. Carcinoma Cheek, C. Carcinoma Tongue, D. Carcinoma palate
A: Carcinoma Lip
Answer: A: Carcinoma Lip 
Explanation: Carcinoma of the oral cavity

A most common type of carcinoma of the oral cavity is squamous cell carcinoma
In the oral cavity, tongue (30%) is the most common site followed by the lip (17.4%) and the floor of mouth (16.4%)
The mortality from squamous carcinoma also varies by the site in the mouth, with the lowest mortality from lip cancer and the highest for cancer of the Tongue.