The correct answer is: C. Either I or II follows
The first statement is “Some papers are pens.” This means that there exists at least one paper that is also a pen. The second statement is “Some pencils are pens.” This means that there exists at least one pencil that is also a pen.
From these two statements, we can conclude that there exists at least one object that is both a paper and a pen. This means that conclusion I, “Some pens are pencils,” follows.
However, we cannot conclude that there exists at least one object that is both a pencil and a paper. This means that conclusion II, “Some pens are papers,” does not follow.
In other words, we can conclude that there exists at least one object that is a pen and a paper, but we cannot conclude that there exists at least one object that is a paper and a pen. Therefore, either conclusion I or conclusion II follows, but not both.