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: Forensic Medicine
Lead inhibits which enzymes in the heme synthesis pathway: CMC (Vellore) 07 
Select and explain. 
A. Aminolevulinate synthase, B. Ferrochelatase and 6-ALA dehydratase, C. Porphobilinogen deaminase, D. Uroporphyrinogen decarboxylase
B: Ferrochelatase and 6-ALA dehydratase
Answer: B: Ferrochelatase and 6-ALA dehydratase 
Explanation: Ans. Ferrochelatase and 6-ALA dehydratase