At a minimum threshold, how many milliamps of current through the body produces a condition where most people would suffer ventricular fibrillation and could only be resuscitated with a ventricular defibrillator?

Correct Answer: Option D — 75 mA for 5 sec.

Current reaching 75 milliamperes sustained for 2.5 to 5 seconds disrupts the heart's electrical coordination, inducing fatal ventricular fibrillation. Marine safety references note that immediate application of an automated external defibrillator is mandatory for successful resuscitation.