input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** In genomic imprinting. DNA is modified by:   (A) Acetylation   (B) Methylation   (C) Phosphorylation   (D) Deamination
output: ['(B) Methylation <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Acetylation  (B) Methylation  (C) Phosphorylation  (D) Deamination <> possible answers', '  In genomic imprinting. DNA is modified by: <> context']