Option 1 -> Incorrectly matches Real GDP with commodities traded in bulk and Nominal GDP with constant prices.
Option 2 -> Correctly matches: Real GDP with constant prices (II), Nominal GDP with current prices (IV), CPI with consumer commodities (III), and WPI with bulk commodities (I).
Option 3 -> Incorrectly matches Real GDP with bulk commodities and WPI with constant prices.
Option 4 -> Incorrectly matches Real GDP with current prices and Nominal GDP with bulk commodities.
Hence, Option 2: (A) - (II), (B) - (IV), (C) - (III), (D) - (I) -> Real GDP is measured at constant/base year prices to remove inflation effects, Nominal GDP uses current market prices, Consumer Price Index tracks retail prices of goods/services purchased by households, and Wholesale Price Index measures prices of goods traded in bulk at wholesale level. -> correct