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Hi! Which means a choice of 3 or more alternatives as written below. Which one means a choice between two alternatives as written below. Am I correct? Thanks, Fulvio

Which country on the world map is shaped like a boot?

A: Germany B: Norway C: Italy


Which one do you like, red or blue?

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yellowstarstruckAm I correct?

No.

Which book do you want?

There have to be at least two books to choose from.

CB

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yellowstarstruckchoice of 3 or more alternatives ...
a choice between two alternatives

There is no difference in the use of "which"/"which one" based on these factors.

You can use either of those no matter whether the choice is between two or between more than two alternatives.

CJ