Most common porphyria in humans is due to deficiency of which of the following enzyme:

Porphyria Cutanea Tarda is the most common porphyria. Enzyme defect:- Uroporphyrinogen decarboxylase Sporadic (type 1) Familial (type 2) Can also develop after exposure to halogenated aromatic hydrocarbons. MC Acute porphyria - Acute intermittent porphyria MC porphyria in children - Erythropoietic protoporphyria