This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rectum and anal canal, Subject name: Surgery
Treatment of stage II carcinoma anal canal: 
Select and explain. 
A. APR, B. APR followed by chemoradiation, C. Concurrent chemoradiation, D. Neoadjuvant chemotherapy followed by Surgery
C: Concurrent chemoradiation
Answer: C: Concurrent chemoradiation 
Explanation: Anal Canal Carcinoma- - NIGRO regimen - Chemotherapy followed by radiation * 5- fluorouracil + Mitomycin-C followed by radiation