This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Definitions and Concepts in HP, Subject name: Social & Preventive Medicine
[{'content': 'In the management of stores VED, D stands for: \nSelect and explain. \nA. Discrete, B. Desirable, C. Decide, D. Definite', 'role': 'user'}, {'content': 'Answer: B \nExplanation: VED ANALYSIS Vital drugs: Items whose absence cannot be tolerated (10% of total items). Essential drugs: Items whose absence can be tolerated for some time (40% of total items). Desirable drugs: Items whose absence can be tolerated for long time (50% of total items). ALSO REMEMBER ABC analysis: Always better control. SDE analysis: Scarce - Difficult - Easy availability. FSN analysis: Fast moving - Slow moving - Non moving.', 'role': 'assistant'}]