Correct option is B
The standard file extension for a PowerPoint presentation is .ppt (legacy, pre-2007) and .pptx (Office Open XML, 2007+).
These are the default formats when you create and save a normal slideshow/editable deck in PowerPoint.
Options (a) .pot/.potx are template formats, used to create new decks with predefined styles.
Option (d) .pps/.ppsx are PowerPoint Show formats that open directly in Slide Show mode.
Option (c) .png/.pngx are image formats (and “.pngx” isn’t a standard extension).
Hence, the “correct extension for PowerPoint presentations” is .ppt / .pptx.
Options (a) .pot/.potx are template formats, used to create new decks with predefined styles.
Option (d) .pps/.ppsx are PowerPoint Show formats that open directly in Slide Show mode.
Option (c) .png/.pngx are image formats (and “.pngx” isn’t a standard extension).
Hence, the “correct extension for PowerPoint presentations” is .ppt / .pptx.
Important Key Points
- .ppt → binary (97–2003); .pptx → XML (2007+).
- .pot/.potx = templates; .pps/.ppsx = direct show files.
- Compatibility: .pptx is smaller, safer (ZIP+XML), and better for modern features.
- Editing vs Showing: .ppt/.pptx for editing; .pps/.ppsx for presenting.
- Conversion: PowerPoint can convert between these formats.
- Non-standard: “.pngx” is not a recognized PowerPoint extension.
Knowledge Booster
- If a deck always opens in Slide Show, it’s likely saved as .ppsx—rename to .pptx (or use “Save As”) to open in edit mode by default.
- For reusable styling, save as .potx and start new decks from it.
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