Correct option is C
The correct answer is (c) xlsx
Explanation:
● Since MS Office 2007, the default extension for an Excel workbook is .xlsx.
● Older versions (up to 2003) used the .xls extension.
Information Booster:
● .docx is for Word, .pptx is for PowerPoint.
● The 'x' at the end stands for XML (Extensible Markup Language).
Additional Knowledge:
● .csv (Comma Separated Values) is a generic file format often opened in Excel.