Which Windows Version Introduced Metro Interface?

B.

The correct answer is B. Windows 8.

Windows 8 was released in 2012, and it introduced the Metro interface (also known as Modern UI). The Metro interface was designed to provide a touch-friendly interface for tablets and other touch devices, but it was also available for desktop and laptop users.

One of the key features of the Metro interface was the ability to use applications (also called "apps") in a full-screen mode. These apps were designed to be lightweight and easy to use, and they could be downloaded from the Windows Store. The Metro interface also allowed users to organize their apps into customizable groups and access them from the Start screen.

Windows 8.1 was released in 2013 as an update to Windows 8, and it introduced some changes to the Metro interface, such as the ability to boot directly to the desktop and the return of the Start button. However, the Metro interface and its app ecosystem remained a key part of the operating system.

Windows 10, which was released in 2015, introduced some further changes to the Metro interface, including the ability to run apps in resizable windows and the integration of the Windows Store with traditional desktop applications. However, the Metro interface itself was largely replaced by the new Start menu, which combined elements of the traditional Start menu with the Live Tiles introduced in Windows 8.

In summary, the Metro interface and its app ecosystem were introduced in Windows 8, making B. Windows 8 the correct answer to the question.