It is a kind of quota which is related to the classes like -
NCC -  National Cadet Corps
S  -       Ex Service Men
FF -      Freedom Fighter
H -        Physically Handicap (Person with Disability)
X -         NIL

So if belong to any of above said class then kindly choose the one and proceed further and if you dont belong to that then select X as nil and press predict now.

Hope this helps!!!

Which course college predictor you are asking for?