The correct answer is Bit.Bit ?A bit or binary digit is the smallest unit of measurement used to quantify computer data.It contains a single binary value of 0 or 1.A single bit can define a boolean value of True(1) or False(0).Generally, data transfer rates are measured in bits. Binary Number System?It contains two unique digits 0s and 1s.It is also known as the Base 2 system.The binary numbers 0 and 1 are called a bit.The computer always calculates input in binary form.Gottfried Wilhelm Leibniz developed the binary systemAdditional InformationByte?A byte is a unit of digital information that most commonly consists of eight bits.A byte is the number of bits used to encode a single character of text in the computer.Nibble ?A nibble is a four-bit aggregation or half an octet.it is also known as half-byte or tetrad.BCD?In computing and electronic systems, binary-coded decimal is a class of binary encodings of decimal numbers where each digit is represented by a fixed number of bits.It is implemented in the instruction set of machines.