This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
Menkes syndrome is a disorder of 
Select and explain. 
A. Copper transpo, B. Iron Transpo, C. Sodium transpo, D. Potassium Transpo
A: Copper transpo
Answer: A: Copper transpo 
Explanation: Menkes kinky hair syndromeEtiologyFeaturesPrognosisX-linked metabolic disturbance of copper metabolismMutation in copper-transpoing ATP7A geneMental retardationHypocupremiaDecreased circulating ceruloplasminChildren with this disease often die within 5 years because of dissecting aneurysms or cardiac rupture(Ref: Harrison's 18/e p604)