If maximum energy is stored in capacitor at t=0, then find the time after which current in the circuit will be maximum.

Correct option is B. π/4ms
In L-C oscillation total time in one complete cycle.
T=2π√LC
T=2π√(25×10⁻³×10×10⁻⁶);
T=2π√(25×10⁻⁸)
T=2π×5×10⁻⁴
T=π×10⁻³sec
After time T/4 capacitor is fully closed
then T/4=π×10⁻³/4=π/4ms.