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: Microbiology
In the gut, anaerobic bacteria outnumber the aerobes by a ratio of - 
Select and explain. 
A. 10:01, B. 100:01:00, C. 1000:01:00, D. 10,000:1
C: 1000:01:00
Answer: C: 1000:01:00 
Explanation: In the human intestines, Anaerobes out number aerobic bacteria a thousand fold