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
[{'content': 'Which of the following measures sensitivity: September 2011 \nSelect and explain. \nA. True negatives, B. True positives, C. False positives, D. False negatives', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: True positives Sensitivity denotes true positives', 'role': 'assistant'}]