Anodized aluminum is ...

During the electrolysis of brine,by using inert electrodes,

$A$ solution of sodium sulphate in water is electrolysed using inert electrodes. The products at the cathode and anode are respectively:

On electrolysis of aqueous solution of $KI$ in presence of platinum electrodes:
$(a)$ Hydrogen gas is released at cathode
$(b)$ Oxygen gas is released at anode
$(c)$ $pOH$ of solution decreases
$(d)$ There is deposition of potassium at cathode
Choose the correct option from following

Assertion : During electrolysis of $CuSO_{4(aq)}$ using copper electrodes,copper is dissolved at anode and deposited at cathode.
Reason : Oxidation takes place at anode and reduction at cathode.

Which one of the following materials conducts electricity?