What is the file extension for documents created in Microsoft Word 2013 and later?

Correct option is B

The .docx extension is used for documents created in Microsoft Word 2007 and later versions, including Word 2013. It is based on the Office Open XML format.
Important Key Points:
1. The .docx format improves file compression and compatibility compared to the older .doc format.
2. It supports advanced features like embedded images, charts, and macros.
3. Word files with .docx are widely supported across different operating systems and word processors.
Knowledge Booster:
· .pdf: A portable document format mainly used for fixed-layout files.
· .xls: Used for Microsoft Excel spreadsheets.
· .pptx: The extension for PowerPoint presentations.
· .txt: Plain text files without formatting.