Hello Piyush,

There is no chance to participate directly in CSAB special round 2 without participating in special round 1. If you want to know more information about the CSAB special round then you have to check the official website of it. here is the link.

Https://csab.nic.in/cms/Public/Home.aspx

Once you can go through this link and check the business rules. hope it helps you.

thank you.