In the P wave

it represent activated of Rt atrium

P wave is upright in lead AVR

Normal P wave is 3 m.m is height

Normal P wave is 2.5 m.m n width

it is biphasic normally

Explanation

The correct option regarding the P wave is It represents activation of the right atrium.

The P wave in an electrocardiogram (ECG) represents atrial depolarization

Typically starting from the sinoatrial (SA) node and spreading through the atria. Therefore, it reflects the activation of the atria, including the right atrium.