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# The increasing order of the reactivity of the following halides for the $S_N1$ reaction is : <br> <img src="http://clay6.com/mpaimg/1208_a.jpg "/>

( A ) (II) < (III) < (I)
( B ) (III) < (II) < (I)
( C ) (II) < (I) < (III)
( D ) (I) < (III) < (II)