A hospital's new wing includes a corridor built with fire-resistive construction per the California Building Code. According to CMC Section 407.4.1.3, can this corridor be used to convey exhaust air from a patient room?

• Yes, corridors can always be used for exhaust air transfer.
• Yes, but only if the patient room is under negative pressure.
• Yes, but only for toilet rooms less than 50 sq ft.
• No, it is prohibited.