What is an extension of MS Word File?

A. .doc

B. .png

C. .xlm

D. .txt

Detailed Solution: 

The correct answer is .doc

Key Points:

• The DOCX and DOC file extensions are used for Microsoft Word documents, part of the Microsoft Office Suite of software.
• XLSM is the file extension that is assigned to spreadsheets created by Microsoft Excel 2007 and newer. They are saved using the Open XML standard.
• PNG is short for Portable Network Graphic, a type of raster image file. It's particularly popular file type with web designers because it can handle graphics with transparent or semi-transparent backgrounds.
• A TXT file is a standard text document that contains plain text. It can be opened and edited in any text-editing or word-processing program.