There is no cap on the no.of Colleges you can select during Choice Filling. However, the seat allotment will be done based on the merit and your preferences. You may select any no.of Medical Colleges and lock them as your options. Even if you have forgotten to save and submit the colleges you chose, the system will automatically lock them for you on the last day of choice filling by 5.00pm IST. And you will allotted a college from this list.