The Automatic External Defibrillator Will Indicate That a Shock Is

The automatic external defibrillator will indicate that a shock is needed if it detects which of the following rhythms?
1) Bradycardia
2) Atrial fibrillation
3) Ventricular fibrillation
4) Ventricular tachycardia

A) 1 only
B) 1 and 2 only
C) 3 and 4 only
D) 1, 2, and 3 only