Which molecule possesses the general formula of carbohydrates,but is not a carbohydrate?

Starch,cellulose,glycogen,and chitin are polysaccharides. Match these with the following sources and write the correct pair for each:
$(a)$ Cotton fibre
$(b)$ Exoskeleton of cockroach
$(c)$ Liver
$(d)$ Peeled potato

Which of the following is not a polysaccharide?

Which of the following carbohydrates is synthesized by nature on the largest scale?

Cellulose is a -

Which carbohydrate molecules cannot be further hydrolyzed into simpler forms?