This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anal Canal, Subject name: Surgery
[{'content': 'Nigro protocol is for management of - \nSelect and explain. \nA. Rectal carcinoma, B. Anal canal carcinoma, C. Gastrinoma, D. Renal cell carcinoma', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Anal canal carcinoma * Nigro protocol includes combined radiation and chemotherapy with 5FU and mitomycin C. It is commonly used in management of anal canal carcinoma.", 'role': 'assistant'}]