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': 'A nucleic acid was analyzed and found to contain 32% adenine, 18% guanine, 17% cytosine and 33deg/o thymine. The nucleic acid must be: \nSelect and explain. \nA. Single-stranded RNA, B. Single-stranded DNA, C. Double-stranded RNA, D. Double stranded DNA', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Double stranded DNA', 'role': 'assistant'}]