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
Total number of genes in a human being is? 
Select and explain. 
A. 800,000, B. 50,000, C. 100,000, D. 30,000
D: 30,000
Answer: D: 30,000 
Explanation: D i.e. 30,000