Porphyria cutanea tarda (PCT) - most common disorder of porphyrin (heme) synthesis - what enzyme is deficient? Major symptom? a) Uroporphyrinogen decarboxylase; Photosensitivity b) Hydroxymethylbilane synthase; Neuropsychiatric symptoms c) Ferrochelatase; Hemolysis d) Porphobilinogen deaminase; Abdominal pain