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.

The correct answer is $\boxed{\text{C}}$.

Statement 1: Some books are pens.

Statement 2: No pen is pencil.

Conclusion 1: Some pens are books.

This conclusion follows from Statement 1. If some books are pens, then some pens must be books.

Conclusion 2: Some pencils are books.

This conclusion does not follow from the statements. The fact that some books are pens does not mean that some pencils are books.

Conclusion 3: Some books are not pencils.

This conclusion follows from Statement 2. If no pen is pencil, then some books cannot be pencils.

Conclusion 4: All pencils are books.

This conclusion does not follow from the statements. The fact that no pen is pencil

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