"The Ministry of Statistics and Programme Implementation (MoSPI) is underway to revise the base year of Gross Domestic Product (GDP). The base year is revised periodically to better capture the structural changes happening in the economy. The proposed new base year for the GDP is 2022 - 23." The step taken by the Government of India is for revision of ___________ Gross Domestic Product (GDP), as it is measured at ___________ prices. (Choose the correct option to fill in the blanks)