This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
[{'content': 'Radiation affects: \nSelect and explain. \nA. RNA, B. DNA, C. Mitochondria, D. Cytoskeleton protein', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) DNARef: Harper's Biochemistry, 30lh ed. pg. 724* Radiation exposure leads to increased destruction of DNA.* Radiation causes pyrimidine dimerization- leading to DNA damage.", 'role': 'assistant'}]