Which of the following is more basic than aniline?

For amines,

Basicity $\mathrm{\alpha }$ electron density on nitrogen atom

Benzylamine has $+\mathrm{I}$ effect due to $-{\mathrm{CH}}_2$ group present in it.

Diphenylamine and triphenylamine have an -I effect due to phenyl rings in it.

p-nitroaniline has -I effect due to phenyl ring and -M effect due to nitro group.

Thus due to the presence of electron withdrawing groups diphenylamine, triphenylamine and p-nitroaniline are less basic than aniline and due to electron donating group benzylamine is more basic than aniline.