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
[{'content': 'Factors which is associated both with exsposure and disease is called - \nSelect and explain. \nA. Confounding factor, B. Risk factor, C. Proximal risk factor, D. case', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Confounding factor is defined as one which is associated both with exposure and disease and is distributed unequally in study and control groups. More specifically a confounding factor is one that although associated with exposure under investigation is itself independently of any such association, such as a risk factor for the disease. (refer pgno 72, park 23 rd edition)', 'role': 'assistant'}]