Each of the following groups represent situations presenting high caries risk except one. Which one is the exception?

Question

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Although vegans are often deficient in protein, they are not at high risk for caries. Their strict adherence to plant-based diets generally precludes foods highly associated with increased caries risk. Note that polypharmacy is a term referring to patients taking numerous medications. Xerostomia, or dryness of the oral tissues, is a frequent side effect of multiple medications, which significantly increases caries risk.

Each of the Following Groups Represent Situations Presenting High Caries