A basic multiplexer principle can be demonstrated through the

A basic multiplexer principle can be demonstrated through the use of a ___________

A. Single-pole relay

B. DPDT switch

C. Rotary switch

D. Linear stepper

This question was posed to me in a national level competition.

I want to ask this question from Multiplexers (Data Selectors) in section Combinational Circuits of Digital Circuits

Correct option is C. Rotary switch

The explanation: A basic multiplexer principle can be demonstrated through the use of a rotary switch. Since its behaviour is similar to the multiplexer. There are around 10 digits out of which one is selected one at a time and fed to the output.