A file format is a standard way that information is encoded for storage in a computer file. Important PointsAssertion: A bitmap file format (. BMP) is not suitable for graphics on a website. The BMP file format, also known as a bitmap image file, device-independent bitmap file format, and bitmap, is a raster graphics image file format used to store bitmap digital images, independently of the display device, especially on Microsoft Windows and OS/2 operating systems. BMP images are another example of an unsuitable image format for use on the web. BMP images do not compress graphical data. Thus this assertion is true. Reason: Bitmap graphics store information about every individual picture element (pixel) making up an image, thereby giving quite large files. A bitmap is a method by which a display space (such as a graphics image file) is defined, including the color of each of its pixels (or bits). In effect, a bitmap is an array of binary data representing the values of pixels in an image or display. A GIF is an example of a graphics image file that has a bitmap. Thus the reason is true. Hence both (A) and (R) are true and (R) is the correct explanation of (A)