The correct option is
B Polysaccharide
Chitin is a polysaccharide. It is an important component of the cell wall of fungi. It is the main constituent of the exoskeleton of the arthropods. It is a long chain polymer of N-acetylglucosamine. It is a modified form of glucose. The bond formed between the glucose molecule is known as glycosidic linkage.
So, the correct answer is option B.