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: Pathology
The approximate number of genes contained in the human genome is: 
Select and explain. 
A. 40,000.00, B. 30,000, C. 80,000.00, D. 1,00,000.
B: 30,000
Answer: B: 30,000 
Explanation: . 30,000