If the rms current in a 50 Hz a.c circuit is $5\;A$ , the value of the current $\large\frac{1}{300}$ seconds after its value becomes zero is

Question

$\begin{array}{1 1} 5 \sqrt 2 A \\ \frac{5 \sqrt 3}{\sqrt 2}A \\ \frac{5}{6} A \\ \frac{5}{\sqrt 2 }A \end{array}$