Explanation
Solution
To identify which circuits are combinational, we must distinguish between the two main types of digital circuits:
1. Combinational Circuits: In these circuits, the output depends only on the current inputs. They do not have any memory or feedback loops.
-
Half Adder: Adds two single-bit binary numbers. The output is strictly based on the current inputs.
-
Full Adder: Adds three single-bit binary numbers. Like the half adder, it is memoryless.
2. Sequential Circuits: In these circuits, the output depends on the current inputs and the previous state (past history). They contain memory elements.
Comparison:
Final Answer:
The correct option is (a) A, C.
