This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Dental
Menkes&;s kinky hair disease occurs due to 
Select and explain. 
A. Low zinc levels, B. Low copper levels, C. Low Iron levels, D. Low flouride levels
B: Low copper levels
Answer: B: Low copper levels 
Explanation: Menkes Disease * XLR, ATP7A mutation, encodes ATP-dependent copper transpoer * | Serum copper levels, pili toi (most common), trichorrhexis nodosa, sho brittle 'steel wool' hair, sparse eyelashes/eyebrows, cupid's bow upper lip, progressive CNS deterioration, seizures, touous aeries. Ref:- Sima Jain; pg num:- 79