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': 'Polysaccharides are: \nSelect and explain. \nA. Polymers, B. Acids, C. Proteins, D. Oils', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Polysaccharides are polymers of monosaccharides. They are of two types– homopolysaccharides that contain a single type of monosaccharide (e.g., starch, insulin, cellulose) and heteropolysaccharides with two or more different types of monosaccharides (e.g., heparin, chondroitin sulfate).', 'role': 'assistant'}]