How to know which bank nifty options are banned from trading

Hi,

How to know which bank nifty options are banned from trading?

In the morning I tried buying 26500, 26600, 26700 calls (12th Jul expiry) at 9: 18am and Zerodha didn’t allow that order. However I was able to place that order through other broker, why is that so?

As of 9.20, https://zerodha.com/margin-calculator/Futures mentioned that above options could be traded.

@siva

Regards.

First of all, why would u buy the expensive calls like 26500? The best bet in morning was 27000 and 27100

Because I prefer buying deep ITM BN options.