In the following question a statement is followed by four inferences. Select the one which is most appropriate. All the books, written by Prabhakar, are textbooks. Some of his books are published by Pitamber Publishing Company.

• All the books published by Pitamber Publishing Company have been written by Prabhakar.
• Pitamber Publishing Company publishes some critical essays written by Prabhakar.
• Some textbooks written by Prabhakar are published by publishers other than Pitamber Publishing Company.
• Pitamber Publishing Company only publishes textbooks.