Consider the circuit with a Zener diode whose breakdown voltage $V_z=4 \mathrm{~V}$. What is the voltage $V_0$ if $V_i=20 \mathrm{~V} ?$

• A

  8 V
• B

  16 V
• Correct answer
  C

  12 V
• D

  10 V

Hence, the correct answer is option: 'C'.