Only option B should be True not First Why ???
A well ordered set is a total ordered set in which every finite subset has a least element.
Now (Q ∩ [0, 1], ≤) will eventually give ([0,1],<=) wouldn't it ?
Now [0,1] basically contains a subset (0,1) which doesn't have least element , because here if you choose any number then i can always give you a smaller number than that.