A 5-year-old girl develops diffuse erythema with a rough feel
A 5-year-old girl develops diffuse erythema with a rough feel due to raised hair follicles. The skin around her mouth is spared of the rash. Her tonsils appear enlarged and erythematous, and her tongue has a white coating.
Which of the following investigations could confirm the diagnosis?
Select the SINGLE most appropriate option from the list below. Select ONE option only.
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