What is the file extension of an Excel file?

Correct option is B

The correct answer is (b) xlsx.
Explanation:
● Since the release of Microsoft Office 2007, the default file format for MS Excel is .xlsx.
● The 'x' at the end stands for XML (Extensible Markup Language), which makes the files more secure and smaller in size.
Information Booster:
● .xls was the extension used for older versions of Excel (97-2003).
● .csv (Comma Separated Values) is a common format for simple data tables that Excel can open.
Additional Knowledge:
● .docx – Extension for MS Word documents.
● .pptx – Extension for MS PowerPoint presentations.