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: Pathology
[{'content': 'What is meant by Ca colon stage III c - \nSelect and explain. \nA. Hepatic metastasis., B. Extension upto serosa & lymph node, C. Extension upto serosa, D. Extension upto mucosa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]