Choose the correct statement about $Zener$ diode:
- AIt works as a voltage regulator in reverse bias and behaves like simple $pn$ junction diode in forward bias.
- BIt works as a voltage regulator in both forward and reverse bias.
- CIt works a voltage regulator only in forward bias.
- DIt works as a voltage regulator in forward bias and behaves like simple $pn$ junction diode in reverse bias.
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