The correct option is C 80 mm Hg
Blood pressure is the pressure of the blood within the arteries. Systolic pressure is the strongest pressure during the time when blood is forced out of the ventricles. Value of systolic pressure is 120 mm Hg. Diastolic pressure is taken during the resting period, as the ventricles refill with blood. The value of diastolic pressure should be 80 mm Hg for a healthy young adult.