This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rectum, Subject name: Surgery
Treatment of squamous anal carcinoma is: 
Select and explain. 
A. Abdomino perineal resection, B. Laser, C. Chemoradiotherapy, D. Platinum based chemotherapy
C: Chemoradiotherapy
Answer: C: Chemoradiotherapy 
Explanation: Ans. (c) ChemoradiotherapyRef: Page 1266/ Bailey 26th editionNigro Regimen:* Chemo radiation is the latest treatment for squamous cell cancer.* Chemotherapy used are- 5FU + Mitomycin or Cisplatin