An inductance `L` and a resistance `R` are first connected to a battery. After some time the battery is disconnected but `L` and `R` remain connected in a closed circuit. Then the current reduces to `37%` of its initial value in
A. RL sec
B. `(R)/(L)` sec
C. `(L)/(2)` sec
D. `(1)/(LR)` sec
