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. A, B. C, C. B, D. Z', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. B The most common form of DNA is B- DNAQ. Within the cells most of DNA is B -DNA, although regions rich in guanine and cytosine base pairs may assume Z- conformation.', 'role': 'assistant'}]