Hello , 

As your query is your OBC rank is 17433 and the seat alloted to you in 4rth round was for NIFFT . But you want to go for further better options through other rounds of counselling. 

I would like to tell you that of course you can go with other rounds of counselling and the special round of counselling too , but you should keep the seat alloted to you in first round of counselling as float so that eventually if somehow that doesn't work , you'll still have the option . 

Further, if you have any query regarding the same you can let me know in the comment section below.

I hope your query is solved.

Thank you.