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: Skin
Hyperpigmentation is not seen in: 
Select and explain. 
A. Addision's disease, B. Cushing's Disease, C. Graves Disease, D. Hypothyroidism (Myxedema)
D: Hypothyroidism (Myxedema)
Answer: D: Hypothyroidism (Myxedema) 
Explanation: D i.e. Hypothyroidism