Rationale: A. Stage 1 pressure ulcer: This stage presents as non-blanchable erythema (redness) of intact skin, usually over a bony prominence. The skin is still intact, and there is no open wound. While the area may be painful, firm, soft, warmer, or cooler than surrounding tissue, the epidermis is not broken. This is why option A is incorrect for a stage 2 ulcer. B. Stage 4 pressure ulcer: At this stage, full-thickness skin loss occurs, extending into muscle, bone, or supporting structures. This severe damage often exposes tendons or bone and carries a high risk of infection. Option B is incorrect because stage 2 ulcers do not involve muscle or bone. C. Stage 3 pressure ulcer: This stage involves full-thickness skin loss extending into the subcutaneous tissue, possibly down to the underlying fascia. The adipose layer may be visible, but muscle, tendon, and bone are not exposed. Stage 3 is deeper than stage 2, making option C incorrect. D. Stage 2 pressure ulcer: This stage is characterized by partial-thickness skin loss involving the epidermis and possibly the dermis. It may appear as an open blister, abrasion, or shallow crater. The wound is typically red-pink without slough and does not expose deeper tissues such as fat, muscle, or bone. Stage 2 ulcers indicate early tissue damage but require careful monitoring to prevent progression to deeper stages.