The answer to the question is 0% because it's not a, b, c, or d. But what if choice c were 0% instead of 60%? Then you would have a 25% chance of getting 0% and 0% would not be right.
In my little brain.... there are four answers to the question. Two are identical. So in reality there are only three answers contained in the question. Your random chance is 1 in 3 or 33.323% percent chance. In doing the analytics one must recoginize two answers are the same and dilute it to 1 in 3. I'll check with my actuary.
my math was off. the chance from a practical math point is 3.329 chance. This assumes you factor the two 25s to one. In a less practicle manner, the random choice could be considered - nevermind. My head hurts.