Correct Answer - C
The correct order of basic strenght is
In pyrrole the lone pair of electrons on `N` atom is contributed to the formation of a `(4n+2)` pi- electron molecule i.e aromic sextet In aniline the lone pair of electrons of the N atom is involved in conjugation with the `pi` electrons of the ring In Pyridine (`3^(@)`amine) the lone pair of `N` is carried by `sp^(2)` hybrid orbital while in piperidine the lone pair of `N` by `sp^(2)` hybrid orbital while in piperidine the lone pair of `N` is carried by `sp^(3)` orbital .
