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': 'Base stalking of DNA is done by: \nSelect and explain. \nA. Linear dichromicity, B. Hypochromicity, C. Hyperchromicity, D. Electrophoresis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hyperchromicity', 'role': 'assistant'}]