for applying through nri quata you must , at the time of filling the online form apply under nri by paying rupees 5000 extra in addition to the general fees (which is around 1000) this would make the total application fees aroud 6000. Moreover at the time of joining you will have to pay around 250000 rupees extra (one tine only). your rank will be published in both general and nri basis. you are free to take admission under general rank even after filling nri form,if your rank is good enough