Explanation:

• Fluorescent tubes are fitted with a choke. The choke coil reduces current in the circuit. A fluorescent lamp or a fluorescent tube is a low pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. In fluorescent tubes the simplest ballast for alternating current use is an inductor (choke coil) placed in series, consisting of a winding on a laminated magnetic core. The inductance of this winding limits the flow of AC current on account of its large impedance. The only waste of energy is due to the hysteresis loss in the iron core, which is much less than the waste of energy in comparison to resistance which can also reduce the current if placed instead of the choking coil. Hence option 3rd is correct.