Yes. MCC will release the dates for choice filling and locking for 2nd counselling of NEET PG. During this period, you can fill in fresh choices. There is no cap on the no.of colleges you can select. But you need to save and lock them before 5pm on the last day of choice filling and locking. If you fail to do so, the system will automatically save and lock your options and a seat will be allotted from this list only. And all in all, a seat is allotted on the basis of merit and preference.