Final answer:
The most likely item to appear on a safety checklist for a machine measuring vitals is 'Intact cord and plug', as it's essential for safe operation. The condition of the power supply is a core safety concern for preventing electrical hazards. So the correct answer is Option C.
Step-by-step explanation:
The item most likely to appear on a safety checklist for a machine that measures vitals is C. Intact cord and plug. This is because the physical condition of the power supply is crucial for safe operation. Issues with cords and plugs can lead to electrical hazards, potentially causing damage to the machine or harm to patients and operators. Ensuring that the cord and plug are intact would be a top priority for safety. An item that comes into contact with intact skin but does not penetrate sterile tissues or come into contact with mucous membranes is called a non-critical item.