The exoskeleton of insect is formed of chitin. This is a ------

Options :
  1. mucoprotein
  2. lipid
  3. lipoprotein
  4. polysaccharides


Answer and Explanation :-

Answer: Option 4

Explanation:

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The lessons of life amount not to wisdom, but to scar tissue and callus.
-Wallace Stegner The Spectator Bird