Find out the appropriate pronouns for noun.
Book

The correct answer is: It

In the above sentence we will use 'it' because it, I/me, they/them, he/him, she/her, we/us, are personal pronouns. Personal pronouns are pronouns that refer to specific individuals and groups. Whenever we want to use a pronouns other than human beings then we use 'it' in that case, for human beings we use 'He/she'. In this case, we will use 'it' because a non living thing, that is, a book is shown and anytime a non living thing is addressed, we use 'it'.