A Zener diode is connected to a battery and a load as show below: The currents, $I, I_Z$ and $I_L$ are respectively .

The incorrect statement about the property of a Zener diode is

A zener diode of power rating $2\, {W}$ is to be used as a voltage regulator. If the zener diode has a breakdown of $10 \,{V}$ and it has to regulate voltage fluctuated between $6\, {V}$ and $14\, {V}$, the value of ${R}_{{s}}$ for safe operation should be $….\Omega$

Given below are two statements:

Statement $I$ : Photovoltaic devices can convert optical radiation into electricity.

Statement $II$ : Zener diode is designed to operate under reverse bias in breakdown region.

In the light of the above statements, choose the most appropriate answer from the options given below

Zener diode is used for