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: Dental
[{'content': 'CarieScan PRO works on the principle of: \nSelect and explain. \nA. Beer lambert law, B. Laser fluorescence, C. Alternating current impedance spectroscopy, D. Complementary metal oxide technology have CMOS', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The CarieScan PRO (CarieScan, LLC, Charlotte, NC) is a device for the detection and monitoring of caries by the application\xa0and\xa0analysis\xa0of\xa0AC\xa0(alternating\xa0current)\xa0impedance spectroscopy (ACIST).\nThe CarieScan PRO claims to enable clinicians\xa0to\xa0evaluate\xa0demineralized\xa0tooth\xa0structure\xa0using ACIST by providing information about tissue being healthy, in the early stages of demineralization, or already significantly decayed.\nThe\xa0device\xa0provides\xa0a\xa0color scale and\xa0a\xa0numerical scale\xa0to\xa0determine\xa0the severity\xa0of the\xa0caries\xa0lesion\xa0and\xa0is accompanied\xa0by\xa0management recommendations\xa0that\xa0range from therapeutic prevention to operative intervention appropriate for the extent of the demineralization.\n\nReference- Sturdevant 6th ed Pg- 96', 'role': 'assistant'}]