Heh... I did CPL Law here in NZ a short while ago...
One of the questions was relating to General Aviation Area's... ie. a "simple" lookup in the AIP about the requirements for activating, the controlling authority and the comm frequency to do so...
Unfortunately, the AIP's had been amended in the weeks leading up to the exam and of course the GAA in question had been modified (from ATC Approval to ATC Notification and the frequency had changed)...
Unfortunately, this meant that there were 2 completely wrong answers... and 2 half correct answers... one had correct activation type but incorrect frequency, the other had incorrect activation type but correct frequency.
I wrote a minor essay in the review/critique section at the end, justifying my answer...
Of course, I still got it 'wrong' (judging by the KDR's I got)...
Thankfully, I still passed comfortably...