For an electrophilic substitution reaction, the presence of a halogen atom in
the benzene ring _______.
(i) deactivates the ring by the inductive effect
(ii) deactivates the ring by resonance
(iii) increases the charge density at ortho and para position relative to meta
position by resonance
(iv) directs the incoming electrophile to meta position by increasing the
charge density relative to ortho and para position.
Option (i) and (iii) are the answers.