A book is kept on the surface of a table. If the gravitational

A book is kept on the surface of a table. If the gravitational pull of the earth on the book is the force of action, then the force of reaction is exerted by

1. the book on the table
2. the book on the earth
3. the table on the book
4. the table on the earth

If the gravitational pull of the earth on the book is the force of action, then the force of reaction is exerted by the table on the book.