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?

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

Are contracts on gold also settled like normal futures and options contract on equity?

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?

Are there any points that I must keep in mind while selling options?

Are there any qualitative factors to consider for intraday stock selection? Does it really matter for intraday trading?

Are there any specific risks that I must avoid while buying options?

Are there are any uses of options other than trading on the buy side and sell side?

Are there are some good intraday trading tricks that you can pass on to me?