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': '"Goitre is prevalent in high altitudes"- is an example of: \nSelect and explain. \nA. Direct association, B. Temporal association, C. Indirect association, D. Spurious association', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The indirect association is an association between a characteristic (or variable) of interest and a disease due to the presence of another factor, known or unknown that is common to both the characteristic and the disease. This common factor is also known as the "confounding" variable. In the above example iodine deficiency is the confounding variable. High altitude Iodine deficiency Goitre prevalence Ref: Park 21st edition, page 85.', 'role': 'assistant'}]