How i be a topper of 9th class suggest me..about refrences and book that help me to be a topper ......plz and how many hours i study

@ sahil 
In 9^th class , to become a topper is so easy within your class level . 

in this class only u hv to clear the foundation for JEE / NEET , exam . 
and donot take stress from now and budern your brain . 
FRST of all read the ncert textbooks , and then practice questiond from s.chand . 
the following ref books will help u 
MATHS BY R D SHARMA 
CHEMISTRY BY S CHAND 
BIOLOGY BY DINESH PUBLICATION 
CHEMISTRY BY LAKHMIR SINGH AND MANJEET KAUR 
and u can also take askiitian study package also , they are much more benificial , 
and take part in olympiad , ntse exams , they will help u in improving the competetive aspect of student . 
HOPE IT CLEARS YOUR DOUBT 
donot fix any hour to study , 4 hours will be enough  for u . 
ALL THE BEST ..