This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: X-RAYS, Subject name: Radiology
[{'content': 'Coventional X-ray film is made of? \nSelect and explain. \nA. Silver chloride, B. Silver bromide, C. Silver nitrate, D. Gold chloride', 'role': 'user'}, {'content': 'Answer: B \nExplanation: *The Photosensitive material used in Xray film is Silver bromide *Double coated emulsions of silver halides,mainly silver bromide is used in conventional radiography. Silver halide is the lightsensitive material in the emulsion. The halide in medical x-ray film is about 90 to 99% silver bromide and about 1 to 10% silver iodide (the presence of Agi produces an emulsion of much higher sensitivity than a pure AgBr emulsion).', 'role': 'assistant'}]