Which of the following statements about combinational logic circuits is true?

The statement that combinational logic circuits produce output based on current input values is true. Combinational logic circuits function by taking a set of input signals and generating a corresponding output immediately, without any reliance on previous input states. This characteristic differentiates them from sequential logic circuits, which do consider past input values and utilize memory to hold state information.

In combinational logic, each output is a direct result of the present inputs, making the design and operation straightforward and efficient for performing tasks like arithmetic operations, data routing, and decision-making processes based only on the current input conditions.

While it's accurate that combinational circuits primarily operate using binary signals (as in option C), the critical defining feature is their ability to output results instantaneously based solely on the present inputs. Additionally, they do require input signals to function, making options A and D inaccurate.