Window is to pane as book is to

Answer: page

Explanation:

A window is made up of panes, and a book is made up of pages. This is a part-to-whole relationship where panes are the repeated components of a window and pages are the repeated components of a book.

• novel: Incorrect because a novel is a type or genre of book, not a part that composes a book.

• glass: Incorrect because glass names a material, not the structural part-to-whole match for a book.

• cover: Incorrect because the cover is a single external part of a book, not the repeated unit that a book is made from.