This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Cluster testing is used in the detection of- 
Select and explain. 
A. STD, B. Diabetes, C. Measles, D. Cancer
A: STD
Answer: A: STD 
Explanation: .Cluster testing is used in the detection of of STD S.here the patients are asked to name other persons of either sex ho move in the same socio-sexual environment.these persons are then screened .this technique ha been shown almost to double the number of cases found ref:park&;s textbook,ed22,pg no 312