The correct answer is D. Candida.

The image, along with the vignette, describes paronychia. The causative organism for acute paronychia is usually Staph aureus or Strep pyogenes. However, if the condition is chronic Candida or herpes simplex virus should be considered. Paronychia usually presents after trauma to the area, and treatment options include draining abscess, oral antibiotics, or oral antivirals.

Staphylococcus aureus is a common cause of acute paronychia.
Streptococcus pyogenes is a common cause of acute paronychia.
Pseudomonas aeruginosa is not a common cause of paronychia.
Erysipelothrix rhusiopathiae is a gram-positive rod that commonly causes Erysipeloid.

References: Medical Dermatology chapter, 2.2 Infectious Diseases of the skin, DIR Review book page 96. 2019

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