This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intestinal Polyps, Colon & Anal Cancer, Subject name: Pathology
[{'content': 'Which of the following is one of the most impoant prognostic factors for colorectal carcinoma? \nSelect and explain. \nA. Site of lesion, B. Tumour size and characteristics, C. Age of patient, D. Lymph node status', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Most impoant prognostic factors for colorectal carcinoma are: Depth of invasion of tumor. Presence or absence of lymph node metastasis', 'role': 'assistant'}]