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
Kinky hair disease is due to defect in ? 
Select and explain. 
A. Iron transpo, B. Calcium transpo, C. Copper transpo, D. Magnesium transpo
C: Copper transpo
Answer: C: Copper transpo 
Explanation: Answer- C. Copper transpoKinky Hair Disease(Steely Hair Disease, Menkes disease, Copper Transpo Disease)It is a X-linked recessive disorder that affects copper levels in the body, leading to copper deficiency.It is caused by mutations in the copper transpo gene, ATP7A (located on chromosome Xq21.1), which is responsible formaking a protein that is impoantfor regulating the copper levels in the body.It is characterized by kinky hair, growth failure, and deterioration ofthe nervous system.