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': 'Social Mobility is – \nSelect and explain. \nA. From rural to urban areas for work, B. Industrialization, C. Interaction between cultures, D. Movement in socio–economic stratas', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Social mobility\n\nSocial mobility is the degree to which an individual\'s is family or group\'s social status can change throughout the course of their life through a system of social hierarchy or stratification.\nThe individual or family can move up or down the social classes based on achievements or factors beyond their control.\nIf such mobility involves a change in position, especially in occupation, but no change in social class, it is called "horizontal mobility". Example → a person who moves from a managerial position in one company to a similar position in another.\nIf the move involves a change in social class it is called "vertical mobility". Example → An industrial worker who becomes a wealthy businessman moves upward in the class system.', 'role': 'assistant'}]