The electron in a hydrogen atom makes a transition from `n=n_(1)` to `n=n_(2)` state. The time period of the electron in the initial state `(n_(1))` is eigh times that in the final state `(n_(2))`. The possible values of `n_(1)` and `n_(2)` are
A. `n_(1)=8,n_(2)=1`
B. `n_(1)=4, n_(2)=2`
C. `n_(1)=2,n_(2)=4`
D. `n_(1)1, n_(2)=8`