What is the file extension of flash files?

The file extension of a flash file is FLA but this option is not available in the question above. Flash file is the master document for a flash project; this file can only be opened with Flash.

The file extension for flash video is FLV and FLV files are the preferred format for delivering video clips via flash.
SWF is the file extension that end users see. It is the compressed version of the FLA file that has been optimized for viewing on a web browser.

DOC is a word processing document format used by Microsoft word and other word processing documents.
PPT is a Microsoft power point file format
JPEG is a file extension for images.