This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure and function of protein, Subject name: Biochemistry
Deficiency of which of the following micronutrient results in Menkes syndrome 
Select and explain. 
A. Magnesium, B. Copper, C. Selenium, D. Manganese
B: Copper
Answer: B: Copper 
Explanation: Menkes syndrome, characterized by kinky hair and growth retardation, reflects a dietary deficiency of the copper required by lysyl oxidase, which catalyzes a key step in the formation of the covalent cross-links that strengthen collagen fibers.Ref: Harper&;s Biochemistry; 30th edition; Chapter 5; Proteins: Higher Orders of Structure