Poly-$\beta$-hydroxybutyrate-co-$\beta$-hydroxyvalerate $(PHBV)$ is a copolymer of . . . . . .
- A$3$-hydroxybutanoic acid and $4$-hydroxypentanoic acid
- B$2$-hydroxybutanoic acid and $3$-hydroxypentanoic acid
- C$3$-hydroxybutanoic acid and $2$-hydroxypentanoic acid
- D$3$-hydroxybutanoic acid and $3$-hydroxypentanoic acid
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