This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sampling, Subject name: Social & Preventive Medicine
[{'content': 'What is meaning of Odds? \nSelect and explain. \nA. It is the chance that some event will occur, B. Chance of frequency of occurrence of a characteristic relative to its non-occurrence, C. Chance of frequency of non-occurrence of a characteristic relative to its occurrence, D. Inverse of probability', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Odds is Chance of frequency of occurrence of a specific event, relative to its non-occurrence Odds = Probability/ 1- probability Eg: Probability of Mr. Ram developing MI in his lifetime is 75% , what are odds of developing MI = 0.75/ 0.25 = 3:1', 'role': 'assistant'}]