Depolarisation of atria on ECG is seen as: (A) P-wave, (B) QRS complex, (C) T-wave, (D) ST segment
Answer is A. P wave shows atrial depolarizationQRS complex shows ventricular depolarization T wave shows ventricular repolarizationST segment represents the duration from the end of ventricular depolarization to the beginning of ventricular repolarizationRef: Textbook of medical physiology by N Geetha,2nd edition, page no. 136