Best science(pcm) coaching in kolkata

u can go for FIITJEE, or AAKASH coaching institute. They have all professional teachers who will guide you to achieve your goals. And a little advice don't go by the info that which best student came out from which best coaching institute, a good student can accomplish his goals from anywhere. But

are you asking for iit coaching, then i prefer in Jamshedpur,jharkhand, 'Prerna classes' from where Kislay Raj studied and was all india jee mains 2nd topper(rank 2) in 2014.