Complete hydrolysis of which of the following polymers gives products that each contain both a hydroxyl group and a carboxylic acid group? (One or more options may be correct.)

Answer: B, C, D

PLA, PGA and PHBV are polyesters of hydroxy acids, so hydrolysis gives

- OH

- COOH

compounds. Nylon 2-nylon 6 is a polyamide; hydrolysis gives amino acids, with

- NH X_{2}

and

- COOH

groups.