$NaOH$ is manufactured by the electrolysis of a brine solution. The products of the reaction are:

$O_2$ gas will be evolved as a product of electrolysis of $:$
$(A)$ an aqueous solution of $AgNO_3$ using silver electrodes.
$(B)$ an aqueous solution of $AgNO_3$ using platinum electrodes.
$(C)$ a dilute solution of $H_2 SO_4$ using platinum electrodes.
$(D)$ a high concentration solution of $H_2 SO_4$ using platinum electrodes.
Choose the correct answer from the options given below $:$

The number of electrons involved in the reaction when $1 \ Faraday$ of electricity is passed through an electrolytic solution is?

The unit for the electric current is

When electric current is passed through a cell having an electrolyte,the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution,what happens to the ions?

Electrolysis involves oxidation and reduction respectively at