To determine how long you must wait for a melting pot overload to be reset, let's examine the possible choices:
1. 1 minute: This is likely too short a period for the system involved in a melting pot overload to recover and reset effectively.
2. None of the above: This could be an option if no other choices were correct, but we should evaluate the other choices fully first.
3. 4-5 minutes: This duration provides enough time for the system to cool down and reset properly after an overload.
4. 2-3 minutes: This may not be sufficient time for a proper reset, as systems usually require a bit longer to ensure they are safe and functional again.
Based on these evaluations, the correct answer is 4-5 minutes. Thus, you must wait 4-5 minutes for a melting pot overload to be reset.