When `1 gm` of `U^(235)` is completely annihilated energy liberated is `E_(1)` and when `1 gm` of `U^(235)` completely undergoes fission the energy liberated is `E_(2)`, then
A. `E_(1) gt E_(2)`
B. `E_(1)=E_(2)`
C. `E_(1) lt E_(2)`
D. `E_(1) le E_(2)`