What are the interest rate futures available for trading on the NSE?

Are interest rate futures also traded both on the BSE and the NSE and how are the volumes and open interest on the same?

Can you explain how interest rate futures are settled on the exchange?

How many stocks and indices on the NSE are currently available for future and options trading?

What are the lot sizes of the underlying stocks and Indices that are available for futures and options trading?

Which are the futures and options contracts that are most liquid on any normal trading day on the NSE?

Which are the stock futures contracts that are most liquid on any normal trading day on the NSE?

Are these exchange traded funds some kind of futures trading? Like are the Nifty ETFs the same as buying a Nifty futures contract?

Do interest rates vary depending on whether you are opening an account with a payment bank of a regular commercial bank?

How GOI bonds interest rates are calculated and seem they are not fixed? What is the difference as compared to FD/Bonds etc which only give fix rates?

How has the trading in interest rate futures evolved in India?