The most comun image format are:

-BMP: The BMP file formatis an image file format used to store bitmap digital
images, especially on Microsoft Windows and OS/2 operating systemssystems.


-JPEG:In computing, JPEG is a commonly used method of lossy compression for photographic images. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality.

-PNG:The Graphics Interchange Format (GIF) is a bitmap image format that was introduced by CompuServe in 1987 and has since come into widespread usage on the World Wide Web due to its wide support and portability.The format supports up to 8 bits per pixel allowing a single image to reference a palette of up to 256 distinct colors chosen from the 24-bit RGB color

b) JPEG is the image format that preserves the quality when the image been compressed.
c) GIF is the format that is more suitable for web design.