Which of the following provides a graphical desktop interface for Linux?

The correct choice is VNC, which stands for Virtual Network Computing. It allows users to connect to a remote desktop environment over a network, providing a graphical interface to interact with the Linux system. VNC transmits the graphical display from the remote computer to the local one, enabling users to see and control the desktop environment as if they were physically present. This is particularly useful for remote administration and accessing a graphical interface from a different location.

Other options, such as Xterm and Konsole, are terminal emulators that provide a command-line interface rather than a graphical desktop environment. They allow users to interact with the shell and execute commands but do not offer the full graphical desktop experience that VNC provides. SSH (Secure Shell) is a protocol used for secure command-line access to remote systems; while it can tunnel X11 applications over the network to display on a local machine, it is not primarily designed for providing a complete graphical desktop interface like VNC does.