Hi Rahul,

Yes, you can always opt for other colleges in the next cap round. It is not mandatory for you to accept the college alloted in CAP round 1.If you got a seat in cap round 1 and you dont want that seat than you can either reject that seat or freeze that seat so that that seat will be left for you until you reject and you can move for further colleges in next cap round for getting a better college of your choice. But in the case where you do not freeze your seat your alloted seat will no more be left for you.You can even go for further cap rounds if you dont want a seat alotted in previous rounds.

Hope this may help you. All the best