Epinephrine is used in the management of an acute anaphylactic reaction (Type I allergic reaction) because it
1. decreases heart rate.
2. relaxes bronchial muscles.
3. decreases systolic blood pressure.
4. produces vasoconstriction in many vascular beds.

All of the above.

(4) only

(1) and (3)

(1) (2) (3)

(2) and (4)