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': 'The degree to which a specific health care intervention achieves its objectives, when applied in a given population, is termed as its - \nSelect and explain. \nA. Sensitivity, B. Effectiveness, C. Efficiency, D. Impact', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Effectiveness", 'role': 'assistant'}]