How do starch and chitin differ from each other?

• A. Starch is a polysaccharide of alpha glucose while chitin is a polymer of N-acetylglucosamine
• B. Starch contains α(1→4) glycosidic bonds while chitin contains β(1 → 4) linkage
• C. Chitins is a structural polysaccharide while starch is a storage polysaccharide
• D. All of these

Answer: (D)