sir i have a question related to delta hedge,we can sell call options in order to hedge but can you tell me how can i calculate delta of put option and in delta hedge working why we use N(d1) why not N(d2)
Whenever there has been a put option, then the question has always told you what to use (and it is N(-d1) ). It is d1 that determines how the option price changes with the share price, in the short term (and this is explained in my lecture on option pricing).