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
Polysaccharides are: 
Select and explain. 
A. Polymers, B. Acids, C. Proteins, D. Oils
A: Polymers
Answer: A: Polymers 
Explanation: 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).