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': 'Movement is socio-economic level is \nSelect and explain. \nA. Social equality, B. Social mobilization, C. Socio-economic upliftment, D. Social mobility', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]