What is the spot for settlement of Crude oil options on zerodha?

Commodities
1

Like we look at RBI reference rate for currencies, where to find the same for different commodity options.

2

Settlement price on expiry day for crude oil option will be determined based on daily settlement price of the underlying futures contract

3

Merge commodity with main NSE . (single margin for all Equity/currency/F&O/Commodity.)
Keeping 2 funds seperately for equity & commodity is not practical for us &
hence trading in commodities stopped.