0% chance of answering it right.
Since none of the answers are right.

The answer is B, because, well actually I don't know. Can you explain this?

After tons of pondering I have come to the conclusion.

The correct answer is not there, being 0%.

Why? Because there is no answer, its a paradox. There is 4 options, A,B,C,D = 4, one answer is right, 1/4 (25%) so in good reasoning the answer is 25%. However there is two options with that answer meaning if you input the correct answer you do not have a 25% chance, you have a 50% chance (2/4 = 50%) of getting it right, making the correct answer invalid either way and 50% being your choice no matter what even if its wrong. Therefor the answer is 0%, because a paradox has no answer and either does this question.

i'm going to go with 25 percent chance

There can be no solution, since the ambiguity of correct makes the question ill-posed.

You sir employ fun maths for this time of night!

You normally choosing between four answers have a 25% chance of choosing, however, since two are the same you need to factor into percentages that you have a 50% chance of choosing once answer and a 25% chance of another, and a 25% of another, so thanks to complex mathematics i got the answer to be somewhere around 42.86%

It cannot be 50% because there are three outcomes, but 4 options, so factoring that in it should be just under 50% and just greater than 33.334%

Zoidberg wrote Question:

If you were to randomly select an answer to this question, what would be the percent chance of you guessing correctly?

A.) 25%
B.) 50%
C.) 75%
D.) 25%

What do you guys think of this?

There's a 33% chance because two of those answers are the same thus if the answer is 25% then you have a 1 in 3 chance of picking 25% 1 in 3 chance of 25%

Ehmm

twice 25%
once 50%
once 70%

1 chance to guess 25%
1 change to guess 50%
1 change to guess 75%

3 chances to guess right
so 100 divided by 3 = 33,3%

Im confused as hell as to what is even going on haha.

Completely ambiguous. You could argue 25%, but there's also the possibility of 0% considering I would assume the correct answer would have to be 33%. In other words, my answer is there's 0% of guessing correct because the answer isn't provided, which is 33%..

Edit: I know 0% is not an option, but the question never said we can only use values provided..