If i get college in R1 which far and not good and there is chance that i can get better college in furthers rounds ..and by luck i get so ...then what i should do so that i can make choice beteen both college?
If you receive an unsatisfactory college in the first round but hope for a better one in later rounds, you have a few options: accept the first-round seat and participate in further rounds for upgradation, or reject the first-round seat and wait for the later rounds.
If you choose to upgrade, you can apply for upgradation during the second round while holding your first-round seat. If you get a better college in the second round, your first-round seat will be canceled.
If you don't get a better college, you'll retain your first-round seat. If you reject the first-round seat, you'll have to wait for the subsequent rounds for a better chance. It's recommended to carefully evaluate all options and make an informed decision based on your preferences and priorities.