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How many LED indicators are present on the Adafruit FONA 3G+GPS Breakout?

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How many LED indicators are present on the Adafruit FONA 3G+GPS Breakout?

(a) 2

(b) 1

(c) 10

(d) 4

The question was asked in an online interview.

This key question is from Adafruit FONA 3G+GPS Breakout in division Interfacing of Sensors, Actuators, and Other Modules of Arduino

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The correct option is (d) 4

The best I can explain: There are 4 LED indicators present on the  Adafruit FONA 3G+GPS Breakout. They include; NET for indicating the connection status and AT command acceptance, PWR for indicating when the module is booted, Charging which is usually orange and indicates the status of charge for the on board LiPo Battery, and the Charged LED which indicates when the battery is fully charged.

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