Option 1 -> ₹4,000 is Nominal GDP for 2023 (200 × ₹20).
Option 2 -> ₹2,000 is Real GDP for 2023 (200 × ₹10 base year price).
Option 3 -> ₹3,000 is an incorrect calculation.
Option 4 -> ₹1,500 is an incorrect calculation.
Hence, Option 2: ₹2,000 -> Real GDP is calculated using base year prices to remove the effect of inflation. Taking 2022 as the base year, Real GDP for 2023 = Output of 2023 × Price of 2022 = 200 units × ₹10 = ₹2,000. This measures the actual increase in production without price changes -> correct