A multiplexer with a 4-bit data select input is a
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4 : 1 multiplexer
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2 : 1 multiplexer
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16 : 1 multiplexer
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8 : 1 multiplexer
C
Correct answer
Explanation
A multiplexer with n select lines can choose among 2^n input lines. With 4 select lines, the maximum number of inputs is 2^4 = 16, making it a 16:1 multiplexer. A 4:1 MUX needs 2 select lines, and an 8:1 MUX needs 3 select lines.