I tried to buy call option for Nifty 50 Oct but it was rejected.
As per zerodha margin calculator below the margin required to buy the call option is zero. And the price of the call option mentioned above is around 340 rupees.
And I have around 3k in my zerodha account.
I am not selling the option, which would require a huge premium.
So wanted to know the reason why the order got rejected.