Two different coils have self inductance $L_1=8\;mH$ and $L_2=2\;mH$. At a certain instant , the current in the two coils is increasing at the same constant rate and the power supplied to the two coils is the same . Find the ratio of induced voltage at that instant

Question

$\begin{array}{1 1} 4:1 \\ 1:4 \\ 1:2 \\ 2:1 \end{array} $