Central Board Of Secondary Education [CBSE] — I am complaining about my marks of class 10th

Address:

Vidya SANSKAR ,Patna Bihar

I am EKTA KUMARI, Student of Vidya Sanskar school patna, I want to tell you that the marks which I got in my 10th cbse results, 2021 are very much low As I always used to score 85% to 90% marks in my school..But I got only 50% marks in board results..which is very much unsatisfying..I want to know the reason that on what basis the marks are being awarded to me..I am highly not satisfying with my marks...
So, i kindly request you to review my result.

ROLL NUMBER:{ 22233505 }
SCHOOL CODE: 654780