Final answer:
Pigment in ridges in acral pigmented lesion may be a sign of melanoma.
Step-by-step explanation:
In acral pigmented lesion, pigment in RIDGES is RISKY because it may be a sign of melanoma (C). Melanoma is a type of skin cancer characterized by the uncontrolled growth of melanocytes, the pigment-producing cells in the epidermis. Melanomas typically appear as asymmetrical brown and black patches with uneven borders and a raised surface. The presence of pigment in ridges can be a worrisome sign of melanoma and should be evaluated by a healthcare professional.