1. 

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.

A. Only I follows
B. Only II and III follow
C. Only I and III follow
D. Only I and II follow

Answer: Option C

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.