Auto fill Select box based on previous column

Hi

Is it possible to autofill a select box based on the previous column.

Example
Column A has 3 selections, Design, Manufacture and Install. Based on what’s chosen, Column B will will show certain selections based on Column A.

Here is my selection process

Design - Design (1 Hour)
Installation - Installation (1 Hour)
Manufacture - Shop
- Vehicle
- Window
i.e.
Column A = Design, Column B will give the selection choice of just ‘Design (1 Hour)’. If Column A = Manufacture, Column B will give the selection choice of Shop, Vehicle, Window

Now this is easy enough to do but I’m fed up selecting Design (1 Hour) when there is only one choice, Can I autofill the selection box to just select the one result?