This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Feature of acanthosis nigricans is 
Select and explain. 
A. Insulinoma, obesity & cutaneous hypopigmentation, B. Insulin resistance, obesity, cutaneous hyperpigmentation, C. Thickening of spinous Layer, insulin resistance, obesity, D. Thickening of spinous layer, insulin resistance, lean
B: Insulin resistance, obesity, cutaneous hyperpigmentation
Answer: B: Insulin resistance, obesity, cutaneous hyperpigmentation 
Explanation: None