Fact 1: Some pens don't write. Fact 2: All blue pens write. Fact 3: Some writing utensils are pens. If the first three statements are facts, which of the following statements must also be a fact? I: Some writing utensils don't write. II: Some writing utensils are blue. III: Some blue writing utensils don't write.
A. I only B. I and II only C. II and III only D. None of the statements is a known fact.
Correct Answer: B
Explanation
From Fact 1 and Fact 3, it's clear that some writing utensils are pens and some of them don't write. From Fact 2, we know that all blue pens write, so some writing utensils are blue.
