Thank you!!

"the priority rule" refers to priority to the right hand side, which is not applicable because of the traffic sign below the traffic light.

The question says "When the traffic lights don’t work at this junction, the priority rule applies". And the image shows a traffic light plus a invert triangle below.

The right answer according to the system is "wrong"; and i thought it was right becuase the inverted triangle makes reference to the priority rule; therefore if the traffic light is broken then the priority rule applies due to the fact that in that junction there is a priority sign...

So why is it wrong? I think it is a matter of wording sometimes and it is a bit confusing.

Thank you in advance!