input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following does not or permissive euchromatin due to changes occurring at cytosine residues at CpG islands in DNA?   (A) Methylation   (B) Alkylation   (C) Phosphorylation   (D) Sumoylation
output: ['(A) Methylation <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Methylation  (B) Alkylation  (C) Phosphorylation  (D) Sumoylation <> possible answers', '  Which of the following does not or permissive euchromatin due to changes occurring at cytosine residues at CpG islands in DNA? <> context']