An ECG rhythm strip reveals second-degree AV block with 2:1 conduction. Which of the following statements is incorrect regarding this rhythm?

a. A narrow QRS complex is typically associated with type I AV block.
b. This rhythm is characterized by two P waves before each QRS.
c. The PR intervals progressively lengthen until a P wave appears without a QRS after it.
d. A wide QRS complex is typically associated with type II AV block.

Answer: c. The PR intervals progressively lengthen until a P wave appears without a QRS after it.