Hi Nirvika,

Yes, you can fill in fresh choices and participate for upgradation in 2nd counselling. But, to be eligible, you have to report to the allotted college and join the college. When you report at the allotted college, you have to indicate your willingness to participate in the second round. Or, if you don't report at the allotted college, you can directly participate in the second round. But your previous seat will be automatically cancelled.

All the best.