Amino group is ortho, para-directing for electrophilic substitution on nitration of aniline good amount of m-nitroaniline is added. This is due to
A. In nitration mixture, ortho, para-activity of `NH_(2)` group is completely lost
B. `-NH_(2)` becomes `-NH_(3)^(+)`, which is meta directing
C. `-NH_(2)` becomes `-NH^(+)4O_(square)^(-)`, which is m-direction
D. `-NH_(2)` becomes `-NH^(-)NO_(2)^(+)`, which is m-direction.
