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': 'Proteins which is having DNA binding domain in its structure \nSelect and explain. \nA. Zinc finger, B. Helix-turn-helix, C. Leucine zipper, D. All of these', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]