Kind of confusing – Poker Texas Hold 'Em Quiz Review

I'm used to playing ultimate Texas hold 'em at the casino. There's 5 cards on the board not 4. So when it's asking me for the best hand after the flop , it shows I'm wrong when I have a 4 card straight over trips. So is it considering all five cards or is it asking pre river .. seems to go back and forth
Review by Sincere4stl on Poker Texas Hold 'Em Quiz.