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': 'Total number of genes in a human being is? \nSelect and explain. \nA. 800,000, B. 50,000, C. 100,000, D. 30,000', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. 30,000', 'role': 'assistant'}]