Read the following statements (A – D )
(A) QRS complex in ECG indicates ventricular depolarization.
(B) The electrocardiograph machine is used to obtain Electrocardiogram a (ECG ) on graph paper .
(C) During a cardiac cycle , the left ventricular pumps out about 70 ml is of Oxygenated blood which is called the cardiac output .
(D) The second heart sound is associated with the closure of the semilunar valves .
How many statements from the above is /are incorrect ?

Options

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

Answer

B