input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** In lead poisoning, there is an inhibition of some of the enzymes of the heme biosynthetic pathway. This is reflected by the accumulation of what substance in blood?   (A) Uroporphyrinogen III   (B) Ferrochelatase   (C) Porphob I inogen   (D) Delta amino levulinic acid
output: ['(D) Delta amino levulinic acid <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Uroporphyrinogen III  (B) Ferrochelatase  (C) Porphob I inogen  (D) Delta amino levulinic acid <> possible answers', '  In lead poisoning, there is an inhibition of some of the enzymes of the heme biosynthetic pathway. This is reflected by the accumulation of what substance in blood? <> context']