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
A 6 month old child presented with diarrhea for few days. He had dermatitic lesions on his hands and feet. Scalp hair was comparatively less. Deficiency of zinc was suspected. TRUE about acrodermatitis enteropathica is: 
Select and explain. 
A. Autosomal recessive, B. Autosomal dominant, C. Zinc treatment cures paially, D. Treatment life long
A: Autosomal recessive
Answer: A: Autosomal recessive 
Explanation: Acrodermatitis enteropathica (AE): It is an autosomal recessive disorder of zinc absorption. It presents in infancy, characterized by a triad of acral dermatitis (face, hands, feet, anogenital area), alopecia, and diarrhea. These infants have a defect in an intestinal zinc transpoer, the human ZIP4 protein encoded on the SLC39A4 gene. Mutations in this gene prevents appropriate enteral zinc absorption. AE classically presents during infancy on weaning from breast milk to formula or cereal, which have lower zinc bioavailability than breast milk. Ref: Jen M., Yan A.C. (2012). Chapter 130. Cutaneous Changes in Nutritional Disease. In L.A. Goldsmith, S.I. Katz, B.A. Gilchrest, A.S. Paller, D.J. Leffell, N.A. Dallas (Eds), Fitzpatrick's Dermatology in General Medicine