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
Which of the following is true about coho study? 
Select and explain. 
A. Disease to risk factor study, B. Effect to cause study, C. Not associated with attributable risk, D. Associated with antecedent causation
D: Associated with antecedent causation
Answer: D: Associated with antecedent causation 
Explanation: A coho study is a paicular form of longitudinal study that samples a coho (a group of people who share a defining characteristic, typically those who experienced a common event in a selected period, such as bih or graduation), performing a cross-section at intervals through time. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 83