Psoriasis is characterized by which of the following?

Psoriasis is a chronic skin condition that is specifically characterized by the presence of red papules or plaques that are covered with silvery-white scales. These plaques typically appear on various parts of the body, including the elbows, knees, scalp, and lower back. The silvery scales are a result of the rapid proliferation of skin cells, which leads to the buildup of dead skin on the surface. This hallmark appearance is crucial for the diagnosis of psoriasis and distinguishes it from other skin conditions. As a result, the description of red papules covered with silvery scales accurately encapsulates the primary features of psoriasis, making it the correct answer. In contrast, the other options refer to different skin conditions or symptoms that do not specifically define psoriasis.