Final answer:
The suitable disconnecting means for a fixed appliance is a dedicated switch or circuit breaker specifically for the appliance.
Step-by-step explanation:
The suitable disconnecting means for a fixed appliance is a dedicated switch or circuit breaker specifically for the appliance. A standard power outlet (option a) does not provide a disconnecting means. A circuit breaker (option b) can be used as a suitable disconnecting means, but it is not specific to the appliance. A surge protector (option c) is designed to protect against voltage spikes and is not a disconnecting means for a fixed appliance.