The circuit that is used to interface the keyboard to the PC is _________a.Priority Encoderb.Priority decoderc.Multiplexersd.8:1 MUX

The correct answer to the question regarding the circuit used to interface the keyboard to the PC is a. Priority Encoder.

Explanation:

1. Priority Encoder Functionality: A priority encoder is designed to convert multiple input lines into fewer output lines. In the context of a keyboard, the encoder ensures that when multiple keys are pressed simultaneously, the system recognizes the highest priority key among them.

2. Keyboard Interface: While other options listed (like decoders and multiplexers) play roles in data handling, a priority encoder specifically fits the task of detecting which key (or keys) are pressed on a keyboard, thus facilitating communication with the PC.

This choice allows for efficient representation of key presses and is essential in ensuring that the keyboard inputs are processed correctly by the computer's input system.