Chitin contains: (A) Alpha 1-4 bond, (B) b-1-6 bond, (C) Alfa 1-6 bond, (D) b-1-4 bond
Answer is D. It is present in exoskeletons of crustacea and insects. It is composed of units of N-acetyl-glucosamine with beta -1,4-glycosidic linkage.Ref: DM Vasudevan, page no: 79