In a standard 4-choice question, picking at random is a 25% chance of being right, But because 2 of the answers are 25%, this makes the chance of them being the right answer 50%, thus changing the answer.

And the chance of picking the 1 50% answer is 25%.

the 0% answer cancels itself out, because if it was correct, it would have been a 25% chance. But now, saying that there is no correct answer to the question means that 0% is correct.

basically, none of the answers give the actual % chance of being correct, meaning it's a trick question with no right answer.

Good Trolling.