Digital Signals
Digital signals are a type of electrical signals that contain discrete bits of information. These signals are made up of binary bits (0 or 1), which can be interpreted by computers and other digital devices.

Example of Digital Signals
The correct answer to the question is option C, which is binary bits. Binary bits are the building blocks of digital signals and are used to represent all kinds of information in digital form. Some examples of digital signals include:

- Computer data: All data that is processed by a computer is in digital form, including text, images, videos, and music.
- Internet signals: The signals that are sent over the internet are all digital signals, including emails, web pages, and online videos.
- Mobile phone signals: The signals that are sent and received by mobile phones are also digital signals.
- Television signals: The signals that are used to broadcast television programs are digital signals.

Advantages of Digital Signals
There are several advantages of using digital signals over analog signals, including:

- Noise immunity: Digital signals are less susceptible to noise and interference than analog signals, which makes them more reliable.
- Better quality: Digital signals can be compressed and transmitted without losing quality, which means that they can be transmitted over long distances without degradation.
- Flexibility: Digital signals can be easily processed, manipulated, and stored, which makes them more flexible than analog signals.

Conclusion
In conclusion, binary bits are an example of digital signals, which are widely used in modern technology. Digital signals offer several advantages over analog signals, including noise immunity, better quality, and flexibility.