Q. Which of the following solution is used in black and white photography?
Answer: All of the above
Notes: A photograph is an image made by a photo-chemical reaction which records the impression of light on a surface coated with silver atoms. The reaction is possible due to the light-sensitive properties of silver halide crystals. Silver chloride, silver bromide (AgBr) and silver iodide (AgI) are the three silver halide compounds used in photography.