Correct Answer - A
in the ortho and para positions, `NH_(2)` is electron donating by resonance and is acid weakening. In the meta position it is only electron withdrawing and acid strengthening by induction. Thus, m-aminophenol is expected to be strongest acid but the decreasing order of acid strength is
o- aminophenol is the strongest acid because its phenoxide ion is stabilized by intramolecular hydrogen bonding
`p-` Aminophenol is the weakest acid on acoount of least-`I_(effect*)`.
