This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skin, Subject name: Medicine
What is the most likely cause of these skin changes? 
Select and explain. 
A. Asteatotic eczema, B. Chronic venous stasis, C. Necrobiosis lipoidica, D. Pretibial myxedema
B: Chronic venous stasis
Answer: B: Chronic venous stasis 
Explanation: Answer B. Chronic venous stasisThe chronic changes of dependent edema with hyperkeratosis, papillomatous plaques, and loosely adherent crust and cobblestone-like nodules is most consistent with chronic venous stasis, and is known as elephantiasis nostras verrucosa.