Option 1 -> Incorrect sequence - starts with government buying before setting the price.
Option 2 -> Incorrect sequence - government buying occurs before setting minimum price.
Option 3 -> Incorrect sequence - surplus occurs before equilibrium and price setting.
Option 4 -> Correct sequence following the logical flow of minimum support price implementation.
Hence, Option 4: (D), (C), (B), (A) -> The correct sequence is: First, (D) market equilibrium exists where demand and supply curves intersect at equilibrium price. Then, (C) government intervenes by setting a minimum support price (floor price) above the equilibrium price. This leads to (B) a surplus situation because at the higher minimum price, quantity supplied exceeds quantity demanded. Finally, (A) government purchases the surplus at the predetermined minimum price to support producers and clear the excess supply. This sequence represents the logical chronology of events in agricultural price support mechanisms. -> correct