Explanation for difference in LTP and Close Price for Option?

Can anyone explain me why there is a difference between day’s end LTP and close price for any given option contract? For reference see below attached NIFTY 12000 PE contact, LTP is 3.05 while close price 4.60.

Close price is average of last 30 minute prices, it is practically useless

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closing price of the day on NSE is the weighted average price of the last 30 mins of trading. The difference is usually more if the market is moving around quite a bit in the last 30 mins. Mostly close and settlement price would be the same. MTM will be done based on settlement price only not upon LTP.

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