Central Board Of Secondary Education [CBSE] — 12th CBSE Result partiality

My daughter has 95.4% in Xth, 90% in XI th, now school has given marks in 12th 86%, , school does not know how it is happened...?
The few students by Result partiality given very good marks and even though those students are not got good score in the X, XI and XII preboard exam.
So, I am requesting to CBSE team, please re-review the process of internal assessment School.
I hope CBSE will not encourage such teachers and they will give justice to students

Vikas The Concept School, Sai Krishnaja Hills, Bachupally, Hyderabad, Telangana-500090
Complaint by- N Phadtare