Question

Which of the following pairs of substances could form a polyester?
A) H2NCH2COOH + H2NCH2CH2COOH
B) HO(CH2)4COOH + HOCH2CH=CHCH3
C) HOCH2CH2OH + HOOCCOOH
D) H2C=CHCH3+ HOCH2CH2COOH
E) H2C=CHCN + H2C=CHCH3

Answer

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