In a normal ECG the

A P- wave is due to atrial depolarization
B Q-T interval coincides with refractory period
C QRS-complex coincides with ventricular systole
D T- wave is due to ventricular depolarization
E P-R interval coincides with atrial systole

Correct Answer: P- wave is due to atrial depolarization, Q-T interval coincides with refractory period, QRS-complex coincides with ventricular systole

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