Central Board Of Secondary Education [CBSE] — Less marks given in 12th standard

I was given very low Marks in my 12th standard from cbse . My result was not given As per the official criteria of evaluation of marks which was given by cbse . I want my 12th preboards copy to be checked and re evaluated again as I am damn sure that i have scored very well in them, then also I have been given only 73 % .for further confirmation I want to tell you that I have secured 90.8% in 10th standard and 90.2 %in 11th standard so there is no reason of saying this, that why I have been given very less Marks. So I req you to take a sudden action in this case as it is really critical as it can ruin my career. I am pretty sure of getting 90%+in my 12th standard. Really heartbroken after this bad result which was not expected at all.pls take an action against this problem of wrong evaluation of marks by cbse.

Thankyou

Kushagra sisodia
(Cbse's student)