5. D is the correct answer. This is shingles. This is characteristic grouped vesicles on a erythematous base in a dermatomal distribution. Contact dermatitis can have blister appearance but does not follow a dermatomal distribution. MRSA typically has a more erythematous appearance and does not follow a dermatomal distribution. It may have a central necrotic center. Cellulitis too does not follow a dermatomal distribution and has more of a reddened and warm appearance.
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