The correct option is (d) constriction of pupil.
Explanation:
Parasympathetic nervous system involves conservation of energy and brings about relaxation, comfort, pleasure etc, at the time of rest. Another function of this system ts that during emergency or stress while SNS dilates pupil for more light, PNS constricts the pupil to its normal condition.
Whereas, sympathetic nervous system involves expenditure of energy and increases the defence system of body against adverse conditions, so, it operates during stress, pain, **** and anger.
