In
On
Answer
on
Explanation:
We use “on” when something is resting on the surface of something else.
So, if the book is lying on top of the table, we say:
“The book is on the table.”
“In” is used when something is inside an enclosed space (e.g., in a box, in a bag).
Examples:
The phone is on the table.
The pen is in the drawer.