21. Choice B is the correct answer. Stage I ulcers just have non blanchable erythema with no skin breakdown. Stage II ulcers have some loss of the dermis with an open wound and have a red area in the center. There is no slough. Stage III is full thickness. There maybe subcutaneous tissue visible but there is no muscle, bone, or tendons visible. Stage IV ulcers are full thickness ulcers with bone, muscle, and tendons exposed.
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