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': 'Following required for Normal growth: \nSelect and explain. \nA. Protooncogenes, B. Tumour suppressor genes, C. DNA repair genes, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A i.e. Proto-oncogenes; B i.e. Tumor suppressorgene; C i.e. DNA repair genes', 'role': 'assistant'}]