Open Interest Calculation

The open_interest attribute in websocket quotes :
It is F&O level , but for what strike prices.
For example , zeel is arnd 250 now.So there could be OI changes in nearby and far strike prices.
The value given by Kite connect is OI change of which strike price or it is average or something.
What can u explain calculation of OI values in realtime websocket quotes?
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