<prompt> The enzyme deficient in erythropoietic porphyria is:PBG deaminaseUroporphyrin II cosynthetaseCoprophyrinFerrochelatase  <response>: - Erythropoietic protoporphyria is due to deficiency of enzyme ferrochelataseQ.- All porphyrias are autosomal dominant AD except congenital erythropoietic porphyria autosomal recessive, AR, ALA dehydratase porphobilinogen deficiency AR and X-linked protoporphyria X-linked. 