This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neoplastic Disorders, Subject name: Surgery
Most common anal carcinoma is- 
Select and explain. 
A. Basal cell carcinoma, B. Sq. cell carcinoma, C. Melanoma, D. Adenoma
B: Sq. cell carcinoma
Answer: B: Sq. cell carcinoma 
Explanation: Ans. is 'b' i.e., Sq. cell carcinoma o Mainly 3 types of malignant neoplasm are seen in anal canal:Squamous cell Ca (MC)Basal cell Ca (Ilnd me)MelanomaRemember# MC type of rectal & colon Ca - Adenocarcinoma.