This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
All of the following statements about an intraoral dental
X-ray film are true except: 
Select and explain. 
A. It is composed of a cellulose acetate base coated with a silver bromide emulsion, B. It has a thin sheet of lead foil that lies in front of the film to prevent overexposure, C. It has an embossed dot on it which should be orientated towards the source of X-rays, D. It is exposed by the direct action of X-rays on the emulsion
B: It has a thin sheet of lead foil that lies in front of the film to prevent overexposure
Answer: B: It has a thin sheet of lead foil that lies in front of the film to prevent overexposure 
Explanation: None