Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) The given figure is the ECG of a normal human. Which one of its components is correctly interpreated below - - Sarthaks eConnect

The given figure is the ECG of a normal human. Which one of its components is correctly interpreated below :-

Complex QRS - ventricular depolarization

T wave - atrial repolarization

Peak P and peak R together - systolic and diastolic blood pressure

Peak P-initiation of left atrial contraction only