AIIMS 2019 Physics Capacitors MCQ Question

After the switch is opened at $t = \infty$, the capacitor discharges through the circuit, and the charge $Q$ on the capacitor can be expressed as $Q(t) = Q_0 e^{-t/RC}$, where $Q_0$ is the initial charge, $R$ is the resistance, and $C$ is the capacitance. Given that the charge after 1 second is $20e^{-10} \, \mu C$, option A accurately reflects the exponential decay of the charge over time. The other options (B, C, D) suggest incorrect initial conditions or decay constants, leading to values that do not align with the expected behavior of the capacitor in this circuit.