Exoskeleton of arthropods is made up of (A) Chitin (B) \( \mathrm{N} \)-acetyl galactosamine (C)...

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Exoskeleton of arthropods is made up of
(A) Chitin
(B) \( \mathrm{N} \)-acetyl galactosamine
(C) Glucosamine
(D) Glycogen
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