In the following group : `-OAc(I),-OMe(II),-OSO_(2)(III),-OSO_(2)CF_(3)(IV)` The order of leaving group ability is :

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Answer :

In the following group : `-OAc(I),-OMe(II),-OSO_(2)(III),-OSO_(2)CF_(3)(IV)` ... ` B. `IgtIIgtIIIgtIV` C. `IIIgtIIgtIgtIV` D. `IIgtIIIgtIVgtI`

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