Go through the following statements
(i) Vagus nerve decreases the rate of impulse formation from the SA node and its conduction
(ii) As the human heart is myogenic in nature, the rate of formation and conduction of cariac impulse cannot be changed by the action of nerves
(iii) The end of T-wave in ECG marks the end of systole.
(iv) If the P-wave in ECG is inverted , it indicates that SA node fails to initiate impulse and the atrial muscle depolarises by the impulse originating in A.V. node.
Whic of these are correct ?

Options

A. (i),(ii) & (iii)
B. (i),(iii) & (iv)
C. (ii),(iii) & (v)
D. All are correct

Answer

B