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JEE Main levelSingle correct optionDifficulty 2 of 3pl098

The monomer of polyglycolic acid (PGA) is

A2-hydroxypropanoic acid, $CH X_{3} CH (OH) COOH$
Bhydroxyethanoic acid, $HOCH X_{2} - COOH$
Caminoethanoic acid, $H X_{2} NCH X_{2} COOH$
D3-hydroxybutanoic acid

Answer: B

PGA is

- [O - CH X_{2} - CO] X^{-}

, made from glycolic acid (hydroxyethanoic acid). The lactic acid option gives PLA and the amino acid gives a polyamide.

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