Chlorine can be manufactured from

$1 \ C$ of electricity deposits:

Which one of the following materials conducts electricity?

Which compound gives the same product on electrolysis of fused metal salt and concentrated aqueous solution?

Two statements are given below.
Statement $I$ : Molten $NaCl$ is electrolysed using $Pt$ electrodes. $Cl_2$ is liberated at anode.
Statement $II$ : Aqueous $CuSO_4$ is electrolysed using $Pt$ electrodes. $O_2$ is liberated at cathode.
The correct answer is

What is electrolysis? What can be produced with the help of electrolysis?