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: Social & Preventive Medicine
Probability = 
Select and explain. 
A. Odds / (1 + adds), B. Odds / (1 - adds), C. (1 + adds) / adds, D. (1 - adds) / adds
B: Odds / (1 - adds)
Answer: B: Odds / (1 - adds) 
Explanation: None