Nirmala Niketan College of Home Science

Hello Neha,
No, you cannot do Diploma course from Nirmala Niketan after class 12th, as it have Post Graduation Diploma in Dietetics and Applied Nutrition eligibility criteria are candidate must be a graduate from recognized university.
Admission is based on marks obtained in graduation.
While if you are interested in doing certificate course in food preservation and processing then you are eligible.
Here it is a link for certificate course go through it and solve your further queries.
https://www.shiksha.com/engineering/course/certificate-course-in-food-processing-and-preservation-nirmala-niketan-college-of-home-science-marine-lines-mumbai-120202?city=151&locality=303&fro=serp&pn=1&tn=1&ct=course<i=120202&ts=87157265
Feel free for your any doubts.
Best wishes.

Hi Namrata Raul,
M.Sc. in Nutrition and Dietetics: Admission Process
Some colleges also offer admission on the basis of obtained merit at the level of graduation. However, generally, in most of the colleges and institutes offering the course, admission is provided based on the candidates performance in a relevant entrance test, conducted at any of State and national levels, followed by a subsequent round of counselling.
The round of counselling involves two additional rounds of Group Discussion and Personal Interview, wherein candidates general aptitude for the course is examined. A merit list is subsequently released issued by the institute allocating available seats to the qualifying candidates.