Use of bus selector

Bus selection take in 2 inputs but generate 2 outputs. Is there any equivalent but only generate one output? I would like to plot only 1 output based on the conditions of the inputs.

Thanks.

[William]

I meant the MUX, not the bus selector.

[William]

I will try to explain what I am looking for (The MUX block is not the one I should use). I uesd the If block to compare two inputs & output only 1 signal based on the condition. I am looking for a block in Simulik which will do the selection for me (plot the signal I want). I attached the image of this model.