At a minimum threshold, how many milliamps of current through the body produces a condition where most people would be unable to let go of the energized electrical conductor due to involuntary muscular contraction?

Correct Answer: Option B — 10 to 16 mA

Current levels between 10 and 16 milliamperes stimulate human muscle tissue continuously, causing involuntary contractions. This prevents an individual from releasing an energized conductor, a critical electrical safety threshold emphasized in marine electrical training under 46 CFR and IEEE 45.