The correct answer is A. Red-white longitudinal bands and v-shaped distal nicks.

Darier’s disease presents with hyperkeratotic papules in seborrheic areas, acrokeratosis verruciformis of Hopf, palmar keratosis and pits, and nail findings including red-white longitudinal bands and v-shaped distal nicks.

Oil spots and onycholysis may occur in psoriasis. Clubbing may occur in a variety of conditions such as hypertrophic pulmonary osteoarthropathy. Dolichonychia are long nails that may occur in Ehlers-Danlos and Marfan’s syndrome. Trachyonychia are rough nails that may occur in lichen planus.

Reference: Cohen PR. Longitudinal erythronychia: individual or multiple linear red bands of the nail plate: a review of clinical features and associated conditions. Am J Clin Dermatol. 2011;12(4):217-31.

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