Hi Yashaswini, You can do BSc in Nutrition and Dietetics. Eligibility Criteria (Qualifying Exam) is Pass with 60% aggregate marks in 12th with science stream, subject to qualifying entrance exam (if any). 

Top colleges/universities offering this course in India are:
The Women Christian College
School of Health Science, Kerala
Lovely Professional University, Punjab
D Y Patil University, Navi Mumbai
University of Mysore
University of Madras
Central Food Technology Research Institute
Acharya N.G Ranga Agricultural University
Jadavpur University

Hello Yashaswini,

Here are the steps:

BA in Nutrition or BSc in Nutrition/Food tech.

MA in Nutrition/MSc in Nutrition or Food tech.

Till this much is required for clinical practice.

For academic nutrition, you need a PhD.