The potential difference across a 2H inductor as function of time is shown in figure. At time $t=0$, current is zero.

$\begin {array} {1 1} (a)\;\text{Current} & \quad (b)\;\text{Product of current} \\ (c)\;\text{Product of inductance and current} & \quad (d)\;\text{Product of inductance and change in current} \end {array}$