Max,
For the 3 PPLs done so far, I've sat down with the examiner straight after the exam and worked through the paper, obviously focusing on any incorrect answers. We spent some time on a few of the Nav questions today, but it was time well spent in my view. All part of the learning process I guess, and particularly worthwhile if you've got an examiner can help explain and clarify some of those hair-splitting questions.
The differences between the four possible answers provided for SOME (but not all) questions are often not distinct enough, at least in my view. I've got direct experience of scripting multi-choice questions like these (albeit not aviation-related) and there's quite a science to it. Distinction, if that's the right word, is a key part of it.
HW