Central Board Of Secondary Education [CBSE] — Result of class 12

Address:

1608,Nicolas 2, Supertech CZAR,Omicron 1, Greater Noida

I am not satisfied with the evaluation of my result done by CBSE. I had got less marks and I am not sure, on what basis CBSE has given me such grades.
The students those who were fail in 11 as well as preboard in 12, they have got better marks than me.How is it possible? Not only me, but many students are not satisfied by this evaluation done by CBSE. And now they are saying that we can give exam if not satisfied. That means they are telling us to prepare for board in month because what if a students syllabus is different based on the college he chosed. I want full justification and also this carelessness was not expected by the CBSE.