[quote=GRO post_id=110278 time=1550109698 user_id=2]
The rule says in a built up area you cannot park on a raised verge.
So answer A is correct.
[/quote]

The rule does not say so much that you cannot park on an elevated roadside in built-up areas, but rather that you have to park on an equal ground roadside if there is one. This is not meant to contradict you, it is only a slightly different view.

Answer A is indeed correct. But until yesterday, the site stated that answer C was correct. This explains why the questioner does not understand your answer.

But in the answer it's given C - He must park.

The rule says in a built up area you cannot park on a raised verge.
So answer A is correct.

How can the car park on a raised verge within a built-up area?
The rule says in a built up area you cannot park on a raised verge