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Poly β –hydroxybutyrate-co- β -hydroxyvalerate (PHBV) is a copolymer of

1. 2-hydroxybutanoic acid and 3-hydroxypentanoic acid
2. 3-hydroxybutanoic acid and 2-hydroxypentanoic acid
3. 3-hydroxybutanoic acid and 3-hydroxypentanoic acid
4. 3-hydroxybutanoic acid and 4-hydroxypentanoic acid

Correct answer: 3-hydroxybutanoic acid and 3-hydroxypentanoic acid

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