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': 'Restriction fragment length polymorphism is used for: \nSelect and explain. \nA. Analysis of chromosome structures, B. DNA estimation, C. Synthesis of nucleic acid, D. Detecting proteins in a cell', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Analysis of Chromosal structure', 'role': 'assistant'}]