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Arrange the following alkyl halides in d...

Arrange the following alkyl halides in decreasing order of the rate or `beta`-elimination reaction alcoholic KOH.
A. `CH_(3)-underset(CH_(3))underset(|)overset(H)overset(|)(C)-CH_(2)Br`
B. `CH_(3)-CH_(2)-Br`
C. `CH_(3)-CH_(2)-CH_(2)-Br`

A

`A gt B gt C`

B

`C gt B gt A`

C

`B gt C gt A`

D

`A gt C gt B`

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The correct Answer is:
d
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