The 16-PF personality test by Raymond Cattell.

However, in B, more than half of the questions are missing one point, as I understand it. Hmm...

I might be wrong, but I once came to the conclusion that one question from the "intelligence" category is processed incorrectly, and therefore you can only get a perfect score if you make a mistake when answering that question.
The fact is that I had the exact same version of the test and the answer key, and the correct answer to one of the questions clearly contradicted common sense; even the teacher agreed with me.