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Anniline being basic in nature is protonated by the nitrating mixture. Which makes it a withdrawing group with a very strong -I effect. On the basis of this inductive effect the major product can be deducted to be paranitroanniline (am I correct?).
After the protonated anniline has been ...
If we make a resonance structure for the anilinium ion, with positive charge at either the ortho or the para position, we get a pentavalent nitrogen, which is not possible. So, how is the $\ce{-NH3+}$ group meta-directing in electrophilic aromatic substitution reactions, e.g. in nitration of anil...
