The answer is C because there are only 3 possible answers. So you got a 1/3 chance of getting it right.
Well not quite. While A and D have the same number they are still technically different answers. On a question with 4 answers each will give a 25% chance of being right. Since there are 2 answers with the right answer that gives you a 50% chance. Thus the answer is B
If it could be 3 numbers out of 4 correct, then wouldn't it be 75%?
And if 75% was on there, then there would be 4 numbers possibly correct.
Which would mean it would be 100%, which isn't on there.
This question is invalid.