Macromolecule chitin is 
(a) Nitrogen containing polysaccharide
(b) Phosphorous containing polysaccharide
(c) Sulphur containing polysaccharide
(d) Simple polysaccharide
(a) Macromolecule chitin is a complex polysaccharide containing amino sugars and chemically modified sugars, (e.g. glucosamine, N-acetyl galactosamine, etc). Polysaccharides are long carbohydrate molecules of monosaccharide units joined together by glycosidic bonds. They have a general formula . Chitin is the main component of the cell wall of fungi, the exoskeletons of arthropods, insects and radula of molluscs, etc.