Option writting

Hello sir I want to know one think if I write option strike of nifty at strike price of nifty 10000 which is trading at 37 otm strike if suppose to morrow market show beerish movement and my strike price show premium of 67 I pay additional margin required to hold the strike position after few days due to time decay the strike price is trading at 10 rs my querrybis at the time of closing position at 10 rs what will be selling price will it be 67, or 37 please guide me through this