Chemistry · JEE | Haloalkanes and Haloarenes

In the comparison of \( \text{S}_N1 \) reactivity among isomeric bromobutanes (\( \text{C}_4\text{H}_9\text{Br} \)), which compound exhibits the highest reactivity?

1. A
   \( \text{tert-Butyl bromide } [(\text{CH}_3)_3\text{CBr}] \)
2. B
   \( \text{1-Bromobutane } (\text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_2\text{Br}) \)
3. C
   \( \text{2-Bromobutane } (\text{CH}_3\text{CH}_2\text{CH(Br)CH}_3) \)
4. D
   \( \text{Isobutyl bromide } [(\text{CH}_3)_2\text{CHCH}_2\text{Br}] \)