Which of the following is an example of a Digital Electronic?

Concept: Digital electronics refers to circuits and systems that process, store, or transmit information using discrete binary signals (0s and 1s) rather than continuous analog signals -- any device whose core function depends on binary logic circuitry falls under this category.

Application: Among the choices here, more than one device relies on digital circuitry for its core function: computers process and store data in binary logic, modern mobile phones use digital signal-processing chips for voice, data, and multimedia, and digital cameras use electronic image sensors with digital processing to capture and store images.

Contrast:

• A choice naming only a computing device treats digital electronics as if it were a single, narrow category, when the category is far broader than one device type.

• A choice naming only a communication device makes the same narrowing mistake -- it ignores that computing and imaging devices are digital-electronic just as much as a communication device is.

• A choice naming only an imaging device again picks a single instance of the category rather than recognising that the property holds across several of the listed devices.

• A choice ruling out every listed device assumes none of them use digital circuitry, which is the opposite of what the definition of digital electronics implies for these devices.

Result: Since the digital-electronics property applies to more than a single device among the choices, no single device captures the complete answer, and 'none of the above' is also wrong since digital electronic devices are genuinely represented in the list -- so the option that acknowledges more than one of them is the accurate and complete answer.