This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Health education & planning, Subject name: Social & Preventive Medicine
[{'content': 'Analysis done for the expenditure of large propoion for a small number and vice versa? \nSelect and explain. \nA. ABC, B. SDE, C. VED, D. FSN', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ABC analysis is popularly known as "Always Better Control" is a very useful approach to material management based on Pareto&;s principle of "Vital few and tril many" based on the capital investment of the item. According to Pareto&;s theory O10% items consume about 70 % of the budget (Group A). OThe next 20% consume 20 % of financial resources (Group B) andOremaining 70 % items account for just 10% of the budget (Group C).', 'role': 'assistant'}]