Provided is an ECG image of sinus bradycardia. Identify the wave pattern and describe its characteristics.

The wave pattern shows a normal sinus rhythm with a heart rate of less than 60 beats per minute.

The wave pattern shows an absence of P waves and a heart rate of 40 beats per minute.

The wave pattern shows a prolonged PR interval greater than 0.20 seconds with a slow rate.

The wave pattern shows a regular rhythm with a heart rate between 60 and 100 beats per minute.