This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': 'Most common site of metastasis in Ca colon is \nSelect and explain. \nA. Liver, B. Lung, C. Bone, D. Brain', 'role': 'user'}, {'content': 'Answer: A \nExplanation: One-third of patients will have liver metastases at the time of diagnosis and 50% will develop them at some point, accounting for the majority of deaths. The lung is the next most common site; metastasis to ovary, brain, kidney, and bone is less common.Ref: Bailey and love, page: 1262', 'role': 'assistant'}]