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The use of film badges serves all of these purposes except:

  1. Monitor occupational exposure

  2. Document cumulative exposure

  3. Evaluate exposure the patient receives

  4. Provide patient identification

The correct answer is: Evaluate exposure the patient receives

Film badges are used to monitor occupational exposure and document cumulative exposure by detecting radiation and measuring the amount of radiation present. However, they are not used to evaluate exposure that patients receive, as they are not typically worn by patients. Film badges also do not provide patient identification, which is done through other means such as medical records. Therefore, option C is incorrect because it does not accurately describe the purpose of film badges, unlike the other options.