Always a bad question

6 because in that case nothing is contradicting anything

either B, E, or F.

Please note it's only one of them, because if B is true, then E and F are false. If E is true, it takes the position of true from F and B cannot be true. If F is true, then neither B nor E can be true. I personally find it a tie beween B and F, so flip a coin.

NEVERMIND D MAKES B FALSE THEREFORE F IS THE ANSWER

6

6

6 is the answer since there's nothing left to contradict it

4