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
Base pairs in DNA 
Select and explain. 
A. 1.5 billion, B. 46 billions, C. 3.2 billion, D. 100 billion
C: 3.2 billion
Answer: C: 3.2 billion 
Explanation: None