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: Biochemistry
Which of the following are disorders of copper metabolism? 
Select and explain. 
A. Wilson's disease, B. Menke's Kinky hair syndrome, C. MEDNIK syndrome, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: All of the above are disorders of copper metabolism.
MEDNIK (Mental retardation, Enteropathy, Deafness, Neuropathy, Icthyosis, Kesatoderma) has features of both Wilson's and Menke's disease.