Questions without the right answer in options :\

In round 1 test there were a few questions that did not even have the right answer amongst the options, I did not know what to do so I left em on purpose. Sir Hashim said for there'd be a "report a problem" button on the test page which we're supposed to press for such cases but I did not see any option like that? So I want to know what should we do if this happens again in round 2..? My test's tmrw