The correct answer is: A. decoder
A decoder is a combinational logic circuit that takes a binary code as input and produces a set of outputs, each of which corresponds to a different input code. Decoders are often used to decode data from one format to another, such as from binary to decimal or from ASCII to binary.
A multiplexer is a combinational logic circuit that selects one of several input signals and produces that signal as its output. Multiplexers are often used to switch between multiple data sources, such as when selecting which memory location to access.
An encoder is a combinational logic circuit that takes a set of input signals and produces a single binary code that represents those signals. Encoders are often
used to encode data in a more compact format, such as when converting decimal numbers to binary codes.A demultiplexer is a combinational logic circuit that takes a single input signal and produces one of several output signals, depending on the value of the input signal. Demultiplexers are often used to distribute data to multiple destinations, such as when sending data to multiple memory locations.
In conclusion, a decoder is a combinational logic circuit that generates a particular binary word or number.