Hey Mohd Salman

You have not mentioned the college in which you want to take admission for MSc so I will give you a general view

The minimum eligibility for which is B.Sc. in any stream (preferably environment science). The tope colleges for this course are Gujarat Forensic science university, GGSIU(New Delhi) , Dimoria College (Assam) and Gauhati University (Assam).

You can get a seat in these institutes by Merit/Examination based ranks, depending upon the institute. The course fees may vary between INR 20000 to INR 200000 depending on the institute. All the best.