When transistors are used in digital circuits they usually operate in the:

Explanation

We can use the transistor in the digital circuits to obtain switching operation. The current flow needs to be controlled in the digital circuits for better performance and desirable output. We can stop the current flow by switching off mode and flow the current by the switch on mode. For the switch on mode, the transistor must be in saturation region so that the efficient flow of current through the digital circuit can be achieved and for the switch off mode, the transistor must be in the cut off region, so that flow of current can be stopped in the digital circuits.Therefore, when transistors are used in digital circuits, they usually operate in saturation and cut off regions and option (B) is correct