When current in a coil change from $5\;A$ to $2\;A$ in $0.1\;s$, an average voltage of $50\;V$ is produced . The self- inductance of the coil is :

Question

$\begin{array}{1 1} 0.67\;H \\ 1.67\;H \\ 3\;H \\ 6\;H \end{array}$