Read the following statement (I - IV)
I. The machine that is used to obtain ECG of a patient is called an electrocardiograph .
II. The volume of blood pumped out by each ventricle per cardiac cycle is called the cardiac output .
III. The second heart sound is associated with the opening of both semilunar values .
IV. Hypertension is denoted by the ratio of systolic and diastolic pressure in mm of mercury pressure.
How many statement (s) is/ are correct from the above ?

Options

A. Two
B. Three
C. Four
D. One

Answer

D