What type of arithmetic operation does a full subtractor primarily support?

A full subtractor is a combinational circuit that performs the subtraction of two binary digits and considers a borrow from the previous less significant bit. The primary function of a full subtractor is to subtract two input bits (minuend and subtrahend) while accommodating the situation where a previous operation may have generated a borrow.

In this context, the full subtractor takes three inputs: two significant bits and a borrow input from the previous bit position. It produces two outputs: the difference and the borrow output for the next higher bit. The subtraction operation can result in a borrow if the minuend bit is smaller than the subtrahend bit. This ability to handle the borrow generation and propagate it to the next bit is essential for multi-bit binary subtraction.

The other operations listed, such as addition, multiplication, and division, are not the focus of a full subtractor. This device is specifically designed for subtraction tasks, making it critical in binary arithmetic systems that require accurate calculations, including digital computing and electronic circuits.