Here's an example.
If you want to get a PC and you don’t know from which one to choose, choose something simple.
It doesn't look consistent logically, but another person insists this is the correct form. I find it irregular because it's not exactly a choice if there is only one of… well, anything to choose from.
Is that phrase really better than either of the following examples?
If you want to get a PC and you don’t know which one to choose, choose something simple.
or
If you want to get a PC and you don’t know from which to choose, choose something simple.
Best Answer
"from which one to choose" isn't idiomatic English and doesn't make sense: you can't choose from one.
You have to choose (or select, or pick) from a collection, or a set--from more than one, in other words.
choose from those offered in the store
choose something simple (from those offered or from those available)