This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure of DNA, Subject name: Biochemistry
[{'content': 'Adenine in DNA binds with - \nSelect and explain. \nA. Thymine, B. Guanine, C. Cytosine, D. Uracil', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Thymine o Adenine is always paired with thymine by formation of two hydrogen bonds. Guanine is always paired with cytosine by formation of three hydrogen bonds.", 'role': 'assistant'}]