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The order of reactivities of the followi...

The order of reactivities of the following alkyl halides for a `S_N^2` reactions is:

A

RF`gt`RCl`gt`RBr`gt`RI

B

RF`gt`RBr`gt`RCl`gt`RI

C

RCl`gt`RBr`gt`RF`gt`RI

D

RI`gt`RBr`gt`RCl`gt`RF

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The correct Answer is:
D
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