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A solution of 20.2 g of 1,2-dibromopropa...

A solution of 20.2 g of 1,2-dibromopropane in MeOH upon heating with excess Zn produces 3.58 g of an unsaturated X. The yield (%) is closest to
[Atomic weight of Br is 80]

A

18

B

85

C

89

D

30

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