This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Social science, Mental health & Genetics, Subject name: Social & Preventive Medicine
[{'content': 'Skilled job kupposwami which socioeconomic grade - \nSelect and explain. \nA. 1, B. 2, C. 3, D. 4', 'role': 'user'}, {'content': 'Answer: D \nExplanation: socioeconomic grade of Skilled job in kupposwami is 4 occupation grade 1.profession 10 2. semi-profession 6 3.clerical,shop-owner,farmer 5 4.skilled worker 4 5.semi-skilled worker 3 6.unskilled worker 2 7.unemployed 1 ref ;(page no;690)23rd edition of PARK&;s textbook of Preventive and Social medicine', 'role': 'assistant'}]