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JEE Main levelSingle correct optionDifficulty 2 of 3pl188

Ring-opening polymerisation of lactide (the cyclic dimer of lactic acid) gives

Apolylactic acid (PLA)
Bpolyglycolic acid (PGA)
CPHBV
Dnylon 6

Answer: A

Lactide is the cyclic diester of two lactic acid molecules. Its ring opens at the ester bond to give the polyester PLA, with repeat unit

- [O - CH (CH X_{3}) - CO] X^{-}

.

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