I always have a saying for this Number of hours don't matter, the quality time you spend on studying matters. That doesn’t mean that you just study few hours. There is always a lower limit. For getting a good rank, it must be 6 -7 hrs.. 6 hrs means 6 hrs of good quality teaching. You can break it in part like studying for 1 hour then taking a 20-30 minutes break. You also have to break your time according to subjects. Like giving half time for your weakest subjects and half time for the remaining two. In this way you will also get a command on your weak subject. But you must devote quality time for self study.
All the best!

hi harsh,

see its totally up to you that how capacity you have to study. some study 8 hours a day, some devote only 2-4 hours and do wanders. so in short i just wanna say that devote your qualitative time not quantitative time( i used to study only 4-3 hours a day but cleared my NEET).

so clear your concept and focus on your aim

good luck.