The power backup device UPS stands for:

Correct option is B

A UPS provides temporary backup power to a computer during power failure so that the system can shutdown safely without data loss.
Important Key Points:
1. UPS protects from sudden power cut.
2. Prevents data loss and hardware damage.
3. Contains battery backup inside.
4. Gives user time to save and shut down.
Knowledge Booster:
1. UPS also protects against voltage fluctuations.
2. Commonly used in banks, offices, and server rooms.
3. Types of UPS: Offline, Line-interactive, Online.