Practice a negative answer with specifics, the same way we did earlier in these Lesson 11 and Lesson 12.
First, indicate that the object shown in the image is not what the question is about.
No, it is not a book.
Then indicate what object is actually shown.
This is a telephone.
And, lastly, tell that it is not the wrong object, but the right one.
This is not a book, but a telephone.