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: Medicine
[{'content': 'Measurement of all proteins expressed in cell or tissue is \nSelect and explain. \nA. Epigenetics, B. Genomics, C. Proteomics, D. Knockdown technology', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Geomics - Study of all DNA sequences.\nEpigenetics - heritable changes in gene expression that are not caused by alteration in DNA sequence.', 'role': 'assistant'}]