What are the unique features of the Bank Nifty Futures contracts traded on the NSE and what are the contract sizes?

What are the unique features of the Bank Nifty Options contracts traded on the NSE and what are the contract sizes?

What are the unique features of the Nifty IT Index Futures contracts traded on the NSE and what are the contract sizes?

What are the unique features of the Nifty 50 futures contract traded on the NSE and what are the contract sizes?

What are the unique features of the Nifty 50 Options contracts traded on the NSE and what are the contract sizes?

What are the unique features of the Individual Stock futures contracts traded on the NSE and what are the contract sizes?

What are the unique features of the Nifty IT Index Options contracts traded on the NSE and what are the contract sizes?

What are the unique features of the Individual Stock Options contracts traded on the NSE and what are the contract sizes?

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

What are most active contracts in terms of value traded?

Which are the most active futures and options contracts on the NSE?