Statements : Some books are pens. No pen is pencil.

Conclusions :
I. Some pens are books.
II. Some pencils are books.
III. Some books are not pencils.
IV. All pencils are books.

Explanation:-

Since one premise is particular and the other negative, the conclusion must be particular negative and should not contain the middle term. Thus, III follows. I is the converse of the first premise and so it also holds.