What type of image format supports background transparency?

• A. JPEG.
• B. GIF.
• C. PNG.
• D. BMP.

Answer: (C)

This question focuses on which image formats can include transparency, meaning parts of the image can be see-through, so the background shows through. The key is the alpha channel, which controls how opaque each pixel is.

PNG supports transparency through an alpha channel, allowing either fully transparent or partially transparent pixels. This makes PNG ideal for images with smooth edges and variable transparency, such as logos over different backgrounds or overlays on web pages. JPEG does not support transparency at all. GIF does offer a transparent color option, but it only makes one color fully transparent and cannot handle partial transparency, so edges can look jagged. BMP isn’t designed for transparency in standard use either.

Because of its full alpha transparency capability, PNG is the best choice for images with background transparency.