A 40-year-old man presents with an itchy, scaly rash on his extensor surfaces for about a month. The rash is symmetric and localized to the extensor surfaces. There is minimal inflammation at the lesion sites. What chronic dermatologic condition is most likely? 1. Atopic dermatitis 2. Psoriasis 3. Lichen planus 4. Contact dermatitis 5. Acne vulgaris