Those who don't got qualified as per cut off marks, is there any possibility of getting opportunity to chase their dream?

One exam not the End of any dream. If you are passionate about Medical Sciences this failure is the starting point of chasing your dream. Start a fresh . Sit for another exam basically give yourself another chance. One year loss is nothing if you get chance next year. So chase your dream to a extent that life can say that you have done your level best .
Don't give up.
NB even I got chance in second time . Nobody ever ask about my first attempt.