The correct answer is C. searched.
To ransack means to search through a place in a disorderly and often violent way, typically in order to steal things.
The other options are not correct because:
- Upset means to make someone feel unhappy or disappointed.
- Destroyed means to damage something so that it is no longer usable.
- Attacked means to start a fight with someone, usually using violence.
In the given sentence, Ravi concluded that someone had ransacked the place because the room was in a disorderly state. This suggests that someone had searched through the room in a disorderly and often violent way, typically in order to steal things.
