Answer : 2. "अर्बन यूजर इंटरफेस"
Explanation :

"Urban User Interface" is not a recognized feature of Windows 8. The correct term for the user interface introduced in Windows 8 is the Modern UI or Metro interface, characterized by its tile-based design.

The other features listed—support for ARM processors, support for touch screens, and advanced power management—were indeed features of Windows 8.