<prompt> Acrodermatitis enterohepatica occurs due to?Copper deficiencyZinc deficiencyIron deficiencyFolic acid deficiency  <response>: Ans. B. Zinc deficiency AE is characterized by abnormalities in zinc absorption due to defect in intestinal zinc transporter which leads to zinc deficiency. It is a rare autosomal recessive AR disorder which classically present during infancy on weaning from breast milk to formula or cereal which have lower zinc bioavailability than breast milk. Classical features of AE include: Mnemonic- DEAL Diarrhea, Depression Eczematous erosive dermatitis Alopecia non scarring, Apathetic look Lethargy, irritability, whining and crying. 