If you have Biology in your 10+2 then you can obviously go for the course of Nutrition. In general most colleges in Westbengal offers Chemistry as an Generic Elective but usually Mathematics isn't offered with such combination. There are many colleges which offers combination such as Nutrition, Zoology, Botany. So having mathematics can be a concern but apart from that you can obviously get chemistry as one of your subjects.

To know more about the career in Nutrition visit the link below:

https://www.careers360.com/articles/4880-Career-review-nutrition-and-dietetics

I hope this answer helps. All the very best for your future endeavors!