This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
The enzyme deficient in erythropoietic porphyria is: 
Select and explain. 
A. PBG deaminase, B. Uroporphyrin II cosynthetase, C. Coprophyrin, D. Ferrochelatase
D: Ferrochelatase
Answer: D: Ferrochelatase 
Explanation: - 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).