A fully charge capacitor of capacity $0.1\; \mu F$ is discharged through a resistor of resistance $10^6$ ohms. The time in which the potential falls to half its original value is $[\log_e2=0.6931]$

Question

$(a)\;1.3862\;S \\(b)\;0.6931\;S \\ (c)\;1.414\;S \\ (d)\;1.732\;S$