hi,

see for b.sc and integrated m.sc course main difference isintegrated course is more research oriented and students have to work for thesis from the  3rd year of the course. So in case you are interested to do phd or  m.phil and want to work as a lecturer or research scientist related post it is best to take integrated b.sc + m.sc course.

however make sure the college where you would take admission has good infrastructure , decent faculty students ratio, lab facility .

hope it would help.