Central Board Of Secondary Education [CBSE] — About Grade A1 in board exams

I would like to put forward a complaint regarding the grading system recently introduced by CBSE in board exam. Students who are securing 90%and above are not eligible for A1..that depends on top 1/8th of the passed candidate. Its really an unfair grading system which gives extra pressure to the students. Students who secure more than 90 % to all subjects and not getting A1 grade makes them really depressed after their hard work. In state syllabus all students scoring 90% and above are getting A1.Kindly try to change this unfair grading system