Which of the following are cerebral reflexes?
(i) A person pulls away his hand on touching a hot object.
(ii) A person spits out immediately when a fly enters his mouth while talking.
(iii) A person walking bare foot lifts his foot at once on stepping on to a nail
(iv) A person's pupil contracts at once in the presence of bright light.
A person spits out immediately when a fly enters his mouth while talking and a person's pupil contracts at once in the presence of bright light are cerebral reflexes.