This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Screening, Subject name: Social & Preventive Medicine
[{'content': 'Screening for a disease is application in- \nSelect and explain. \nA. Acute disease, B. Disease with lag time, C. Communicable diseases, D. Low case fatality', 'role': 'user'}, {'content': 'Answer: B \nExplanation: . screening is defined as "the search for unre4cognized disease or defect by means of rapidly applied tests,examinations,or other procedures in apparently healthy individuals.detection programmes should be restricted to thoseconditions in which there is considerable time lag between disease onset and the usual time of diagnosis.in this period there are usually a number of critical points which determine both the severity of the disease and the success of any treatment in reversing the disease process. ref:park&;s textbook of preventive and social medicine,22 nd edition,pg no127', 'role': 'assistant'}]