Amino grup is ortho, para-directing for aromatic electrophilic substitution, On nitration of aniline, a good amount of m-nitroaniline is obtained. This is due to :
A. in nitration mixture, ortho-, para-activity of `-NH_(2)` group is completely lost
B. `-NH_(2)" bencomes " NH_(3)^(+),"which is m-directing"`
C. `-NH_(2)" bencomes "-NH^(+)SO__(4)^(-), "which is m-directing"`
D. `-NH_(2)" bencomes "-NH^(-)SO_(4)^(-)," which is m-directing "`
