Correct option is C
I. All mobiles are laptops.
II. All laptops are notebooks.
III. All notebooks are books.
From the given information Venn diagram will be:

I. All books are laptops. Not follow There is no all parts of books in laptops.
II. Some notebooks are mobiles. Follow There is some part of notebooks in mobiles.
III. All laptops are books. Follow All laptops are in book's part.