The zener diode in the rectangular circuit shown in the figure has a zener voltage of 5.8 volts and a zener knee current of 0.5 mA. The maximum load current drawn from this circuit ensuring proper functioning over the input voltage range between 20 and 30 volts, is

• A. 23.7 mA
• B. 14.2 mA
• C. 13.7 mA
• D. 24.2 mA