Hello Sandeep
If you don't wish to join the college allotted in the first round, you can exit. Free exit for Ist Round means if a candidate allotted a seat in Ist Round and even if a candidate does not report/join the allotted college he would not be penalized and eligible for subsequent rounds.
Refer to the FAQs for detailed information-
https://mcc.nic.in/UGCounselling/Documents/FAQUG1406.pdf
Good Luck!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile