Hello Irfan,

According to the information I colleced,Once you are done with your First Round’s option entry there is no chance for u to add any options for the 2nd round unless a few seats have been added by a college after the 1st round allotment. However, you can change the order of the options that you have entered before the 2nd round allotment.

But, in case you feel like you should’ve put in a few more options, then there is no need to lose hope. The option entry link opens again after the 2nd round and it is just like the way you could enter the options before the 1st round. You can add, remove or re arrange your options.

So u can Change the order after the 1st round, before the 2nd round but u can also add options for the 2nd Extended Round.

My advice - Think calmly and decide the list of colleges (along with the branch) 

Best wishes!!