Explanation:

- Option 1: Uniform Service Broadcasting

- This is not a correct term for USB and does not reflect its function.

- Option 2: Unique Solution Bus

- This is incorrect and not recognized in relation to USB technology.

- Option 3: Universal Serial Bus

- Correct. USB stands for Universal Serial Bus, a standard for connectors and protocols for connection, communication, and power supply between computers and electronic devices.

- Option 4: Universal Service Broadcasting

- This does not represent USB's functionality or definition.

Correct Answer: Option:3 i.e. Universal Serial Bus