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: Pathology
Most common site of squamous cell carcinoma: 
Select and explain. 
A. Floor of the mouth, B. Tongue, C. Buccal mucosa, D. Lip
B: Tongue
Answer: B: Tongue 
Explanation: Lateral border of tongue is the most common site of squamous cell carcinoma.
Carcinoma of the tongue accounts for more than 50% of intraoral cancers in the United States. Two-thirds of lingual carcinomas appear as painless, indurated masses or ulcers of the posterior lateral border; 20% occur on anterior lateral or ventral surfaces, and only 4% occur on the dorsum. For unknown reasons, the oral tongue represents an increasingly common site of involvement in young patients.