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 of the following is not true regarding cDNA \nSelect and explain. \nA. It is DNA complementary to mRNA, B. Reverse transcriptase is needed for its synthesis, C. Synthesis of human insulin requires c DNA, D. Contains  noncoding and  coding sequences.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: C DNA contains only coding sequences.', 'role': 'assistant'}]