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: Unknown
[{'content': 'What is meant by Ca colon stage IIIc. \nSelect and explain. \nA. Hepatic Metastasis., B. Extension upto serosa & lymph node., C. Extension up to serosa., D. Extension upto mucosa.', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e. Extension up to Serosa and lymph nodes Go through the staging of colon carcinoma below and you will get the answer.Staging of colon carcinomaDukesNumericalPathological descriptionAICa limited to mucosa & submucosaB1ICa extends to submuscularb2IICa extends to serosaCIIICa involves regional lymph nodesDIVDistant metastasis in liver, lung etc.", 'role': 'assistant'}]