Poly-β-hydroxybutyrate-Co- β-hydroxyvalerate (PHBV) is a copolymer of __________.

• A. 3-hydroxybutanoic acid and 2-hydroxypentanoic acid.
• B. 2-hydroxybutanoic acid and 3-hydroxypentanoic acid
• C. 3-hydroxybutanoic acid and 4-hydroxypentanoic acid
• D. 3-hydroxybutanoic acid and 3-hydroxypentanoic acid