Which of the key is used to close the active window? A. Ctrl + F4 B. Alt + F4 C. Alt + F6 D. Ctrl + F5

The correct answer is B. Alt + F4.

• Ctrl + F4 closes the active document in a program.
• Alt + F6 switches to the next document window in a program.
• Ctrl + F5 refreshes the active window.

To close the active window, press Alt+F4. This will close the current window and leave any other open windows in the program. If you have multiple programs open, pressing Alt+F4 will close the active window in the current program.

If you are not sure which window is active, you can press Alt+Tab to cycle through the open windows in the current program. The active window will have a blue border around it.

You can also close a window by clicking the “X” in the upper right corner of the window.