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: Surgery
[{'content': 'The ideal colloidal solution is: \nSelect and explain. \nA. Dextran, B. Plasma, C. Albumin, D. Hydroxyethyl starch', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]