G0B01:Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?
Direct answer summary (2023-2027 NCVEC pool)
The official correct answer for G0B01 is Only the hot wires.
The key fact is Only the hot wires. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.