Edgington
I wrote the same exam in Maastricht. Scored 100% and got that question right. The reason that Vref is the wrong answer is simply that the Vref does not change due to wind. All that does happen is that the pilot applies a wind correction factor (usually something like half the steady HWC plus all the gust, to a max value of 20kts, depending on aircraft type) to the Vref for the approach.
Lightning Mate
If you knew anything about how the JAA ATPLs are administered (by the CBR) in Holland, the arrogance of your last posting might be reigned in!