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': 'Which form of DNA is predominantly seen \nSelect and explain. \nA. B DNA, B. C DNA, C. A DNA, D. Z DNA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common form.Right handed double helix.Highly flexible.Watson and Crick model describes the B- form of DNA.', 'role': 'assistant'}]