Half adder->used to add 2 bits
Full adder->used to add 3 bits
controlled inverter-> a circuit that transmits a binary word or its 1’s complement
Binary adder ->used to add 2 binary numbers
Hence ans is D
The controlled buffer and inverter, often called three-state buffers/inverters, each have a one-bit "control" input pin on the south side. The value at this control pin affects how the component behaves:
- When the value on this pin is 1, then the component behaves just like the respective component (a buffer or a inverter (NOT gate)).
- When the value is 0 or unknown (i.e., floating), then the component's output is also floating.
- When the value is an error value (such as would occur when two conflicting values are being fed into the input), then the output is an error value.