<prompt> Which of the following crystal is mostly present in X-rayfilm?KBrKIAgBrAgI  <response>: X-ray film has two principal components: 1 emulsion and 2 base. The emulsion, which is sensitive to X-rays and visible light, records the radiographic image. The base is a plastic supporting material onto which the emulsion is coated. The two principal components of emulsion are silver halide grains, which are sensitive to X-radiation and visible light, and a vehicle matrix in which the crystals are suspended. The silver halide grains are composed primarily of crystals of silver bromide. 