Which of the following statements about the arithmetic circuit is INCORRECT?
1
A half-adder is an arithmetic circuit that adds to binary digits.
2
A half-subtractor is an arithmetic circuit that subtracts one binary digit from another.
3
A full-subtractor is an arithmetic circuit that subtracts one binary digit from another considering a borrow.
4
A full adder is an arithmetic circuit that adds one binary digit and a carry i.e., 3 bits.