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: Surgery
MC type of carcinoma anal canal 
Select and explain. 
A. Adenocarcinoma, B. SCC, C. Basal cell carcinoma, D. Hamartoma
B: SCC
Answer: B: SCC 
Explanation: MC type anal carcinoma is SCC > BCC.