Central Board Of Secondary Education [CBSE] — Teacher has given me less marks than what I deserve

Address:	Hardoi ,uttar pradesh
Website:	Central board of secondary education

Sir, I am a class 12 student in academic session[protected] . sir I am a good student and has topped in 11 in biology section and has scored full marks in all of the practicals . I was fully prepared for the exam until they got cancelled then board said school will allot marks and my biology teacher has alloted such a poor marks to me he have given me 42/70 in bio, 49/70 in physics and 51/70 in chemistry and the student who goes to his coaching got higher marks
kindly do something in this matter