Out of the following options, the most popular combination of shortcut keys to copy selected text in most MS Windows applications is:

Correct option is D

In MS Windows and most software applications, Ctrl + C is the standard shortcut used to copy selected text or objects to the clipboard. This function allows the selected content to be used later with paste operations.
Important Key Points:
1. Ctrl + C is used for copying selected items.
2. Ctrl + X performs cut, which also copies but removes the original.
3. Ctrl + P is used for printing documents.
4. Ctrl + O is used to open a file or document.
Knowledge Booster:
1. The copied content is stored temporarily in the clipboard memory.
2. To paste copied data, the shortcut Ctrl + V is used.
3. These shortcuts are universal across most Windows and Linux applications.