Step 1: Concept
Inventory control methods are used to manage drug stocks efficiently based on different criteria like cost, usage, or criticality.
Step 2: Meaning
VED stands for Vital, Essential, and Desirable. This classification is based on the medical importance/criticality of the drug.
Step 3: Analysis
ABC analysis focuses on cost. FIFO/FEFO focuses on expiry. VED Analysis specifically categorizes drugs so that "Vital" (life-saving) and "Essential" drugs are always in stock.
Step 4: Conclusion
VED Analysis is the primary method used to prioritize the procurement of essential and vital medicines.
Final Answer: (D)