Explanation:- Reserve Bank of India has announced Digital Payments Index (DPI) for September 2021  at 304.06 as against 270.59 for March 2021. ? The Reserve Bank of India’s Digital Payment Index rose by 39.64% to 304.06 in  September 2021 against 217.74 in the year-ago month. ? RBI has introduced Digital Payments Index in January 2021 with March 2018 as the base  year to capture the extent of digitisation of payments across the country. This means that  the DPI score for March 2018 is set at 100. ? RBI has started publishing the Digital Payments Index (DPI) on a semi-annual basis from  March 2021 onwards with a lag of 4 months. ? This means that the DPI will be released by RBI for March and September every year in  the months of July and January respectively.