Correct Option: C

Adrenaline is known as the emergency hormone because it is released by the adrenal glands under the conditions of stress or excitement. It is also a part of the body’s stress response called the fight or flight response. Adrenaline performs various functions in the body such as :
Increasing the supply of oxygen and glucose to muscles and brain;
Increasing the heart rate and the amount of blood pumped by heart per beat;
Dilating the air passages and constricts the blood vessels.