When you park your car and there is fog, snow or heavy rain, the dipped headlights or front and rear fog lights are ALLOWED to be switched on It's not obligatory

There is a thick fog and you park the car on the road.
What’s wrong?

A. The rear fog light may be on.
B. The parking lights and the red rear lights must be lit.
C. The front fog lights may be on.

In this question, the answer is "B".

However, in question 8032

You park your car on an unlit road in the evening. What lights must be lit?
1. The parking lights
2. The two red rear lights
3. The dipped headlights (low beam)

A. Only 1.
B. 1 and 2.
C. 1, 2 and 3.

The answer is "The parking lights and the two red rear lights must be lit".

This is confusing.