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': 'A 13 year old male patient presents to the clinic for routine dental examination and has a history of frequent snacking and sugary beverages. Intraoral examination shows multiple pit and fissure caries and subsurface enamel porosity manifesting as milky white opacity. Which of the following is not a preferred method for diagnostic examination? \nSelect and explain. \nA. Tactile method using Explorer, B. Caries Activity Test, C. Fibre-Optic Trans Illumination, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Traditionally, dentists have relied upon a visual-tactile radiographic procedure for the detection of\xa0dental caries. This procedure involves the visual identiﬁcation of demineralized areas (typically white\xa0spots) or suspicious pits or ﬁssures and the use of the dental explorer to determine the presence of\xa0a loss of continuity or breaks in the enamel and to assess the softness or resilience of the enamel.\nTactile probing with an explorer is no longer used for caries\xa0detection in most European countries, and this protocol has now been adopted by many U.S. dental\xa0schools.\xa0\nThe primary concerns that led to the discontinuation of the probing procedure were as\xa0follows:\xa0\n\nThe insertion of the explorer into the suspected lesion inevitably disrupts the surface\xa0layer covering very early lesions, thereby eliminating the possibility for remineralization of the\xa0decalciﬁed area.\n\xa0The probing of lesions and suspected lesions results in the transport of cariogenic\xa0bacteria from one area to another.\xa0\nFrank lesions requiring restoration are generally\xa0apparent visually without the need for probing.', 'role': 'assistant'}]