Which statement about Class II Methods is correct?

• A. All statements are correct
• B. Only one statement is correct
• C. Two statements are correct
• D. Three statements are correct

Answer: (B)

This question tests how self-referential statements about how many of the statements are true can fit together consistently. Each statement talks about a different count of true statements: four, one, two, or three.

Let the number of true statements be the value x. If all four were true, one of them says the count is four, but the others claim counts of one, two, or three, which would be false, so you can’t have x = 4. If three were true, only the one claiming three could be true, but that would force a different count for the rest, so x = 3 doesn’t work. If two were true, you’d need two statements that can be simultaneously true under x = 2, but none of the statements align with x = 2 in a way that keeps two of them true. That leaves the possibility x = 1: then the statement that exactly one statement is correct would be the true one, and the other three would be false, which is perfectly consistent.

So the only consistent scenario is that exactly one statement is true, namely the one that says only one statement is correct.