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The first steps of `SN^(1)` and `SN^(2)` recatiosns are, respectively
A. Both exothermic
B. Both endotherimic
C. Endothermic and exothermic
D. Exothermic and endothermic

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Correct Answer - `c`
In `SN^(2)`, there is only one step, and it is exhotermic. But in `SN^(1)` there are two steps first step is endothermic and secound step is exothermic.
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