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
[{'content': 'Choose the most appropriate statement about Epigenetics \nSelect and explain. \nA. Irreversible modification of DNA, B. Change in genotype without change in phenotype, C. Change in nucleotide sequence, D. Heritable changes in gene expression', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Epigenetics refers to reversible but heritable changes in gene expression without change in nucleotide sequence.\nIt results in change in phenotype without changes in genotype.\nRefer the byte "Epigenetics"', 'role': 'assistant'}]