Assertion (A) : I⁻ Bromopentane reacts with AgCN to give...

Options

1. AA is true, $\mathrm{R}$ is true and $\mathrm{R}$ is correct explanation of $\mathrm{A}$
2. B$\mathrm{A}$ is true, $\mathrm{R}$ is true but $\mathrm{R}$ is not correct explanation of A
3. C$A$ is true, $R$ is false
4. DA is false, $R$ is true