Regarding ECG - choose the incorrect answer :

Question

( a ) The ventricular contraction occurs with Q and marks the end of the ventricular systole.
( b ) The T-wave represents the return of the ventricles from excited to normal state (repolarisation).
( c ) The P-wave represents the electrical excitation (or depolarisation) of the atria, which leads to the contraction of both the atria.
( d ) The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction.