Dear Dip,

Here is the eligibility criteria to opt M.Sc food & Nutrition from IGNOU:

• B.Sc Home Science with specialization in Food and Nutrition, Clinical Nutrition and Dietetics
  Or
• Graduate (B.Sc. Hons.) with Home Science/ Food Science and Technology, Zoology, Microbiology, Biochemistry, Pharmaceutical along with the DNHE or CNCC or CFN offered by IGNOU.

For more details , refer to this link:

https://www.careers360.com/university/indira-gandhi-national-open-university-new-delhi/msc-food-nutrition-course

Hope this helps !