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': "Kuppuswami's classification is based on all except – \nSelect and explain. \nA. Income, B. Occupation, C. Education, D. Type of house", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Type of house is not included in this index\nResidential address does form an index for socio economic status in another index by Holingshed in USA. This index includes three variables\n\nEducation\nOccupation\nResidential address', 'role': 'assistant'}]