Option 1 states that the red wire is the live wire, the green wire is the neutral wire, and the black wire is the ground wire. This is incorrect because in electrical wiring, the live wire is usually coded with the color black or brown.

Option 2 states that the red wire is the neutral wire, the green wire is the ground wire, and the black wire is the live wire. This is also incorrect because the black wire is commonly used as the live wire.

Option 3 states that the red wire is the live wire, the green wire is the ground wire, and the black wire is the neutral wire. This is the correct color code for the connecting cable of electrical appliances. The live wire carries the current from the source to the appliance, the ground wire provides a safe path for the electrical current to flow into the ground in case of a fault, and the neutral wire returns the current back to the source.

Option 4 states that the red wire is the ground wire, the green wire is the live wire, and the black wire is the neutral wire. This is incorrect as it does not follow the standard color coding for electrical wiring.

Therefore, the correct color code for the connecting cable of electrical appliances is Option 3: Red-live wire,