Discussion
A circuit which is used to sent data from two or more sources through a single transmission line is known as :
Answer: B
The circuit is a Multiplexer.
A multiplexer (data selector) has several data inputs, a set of select lines and one output. The select lines choose which input is passed to the single output line, so data from two or more sources can share one transmission line, in turn.
A de-multiplexer does the reverse, distributing one input line to several outputs. A decoder converts an n-bit code into one of \(2^{n}\) output lines, and an encoder converts one active input line into a binary code; neither puts several sources onto one line.
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