A mother brings her 6-month-old son to the pediatrician. She has noticed that he seems “afraid of light” and, after some Internet re- search, she is concerned that he might be an albino. Laboratory analysis reveals uropor- phyrin in his urine. The child most likely has which of the following conditions?
(A) Deficiency of coproporphyrinogen oxidase
(B) Deficiency of porphobilinogen deaminase
(C) Deficiency of uroporphyrinogen decarbox ylase
(D) Inhibition of ferrochelatase and δ-aminolevulinic acid dehydrase
(E) Overexpression of porphobilinogen deami- nase