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: Skin
Acrodermatitis entero pathica is d/t deficiency of: 
Select and explain. 
A. Zn, B. Se, C. Cu, D. Cr
A: Zn
Answer: A: Zn 
Explanation: A. i.e. Zn Autosomal recessiveQ disorder acrodermatitis enteropathica d/t deficiency of zinc0 is characterized by diarrhea, depression, eczematous dermatitis, alopecia and lethargy. (Mn- DEAL). Zn supplementation rapidly improves conditionQ.