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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))` reaction is :

A

`RF gt RCl gt RBr gt RI`

B

`RF gt RBr gt RCl gt RI`

C

`RCl gt RBr gt RF gt Rl`

D

`Rl gt RBr gt RCl gt RF`

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The correct Answer is:
D
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