The major product of the following reaction is

The major product $$\mathrm{C}$$ in the below mentioned reaction is:

$$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{Br} \xrightarrow[\Delta]{\text { alc. } \mathrm{KOH}} \mathrm{A} \xrightarrow{\mathrm{HBr}} \mathrm{B} \xrightarrow[\Delta]{\text { aq. } \mathrm{KOH}} \mathrm{C}$$

The following reaction method

is not suitable for the preparation of the corresponding haloarene products, due to high reactivity of halogen, when X is :

The compound that will undergo S_N1 reaction with the fastest rate is