Yes, you may. However, please check the official notification for further details. As per previous year’s notice, the authority has stated that the eligibility criteria for RRB Dietitian (Level 7) was- B Sc (Science Graduate) with Post Graduate Diploma in Dietetics (one year course) from a recognized institution plus 3 months internship training in a hospital or B.Sc Home Science with M.Sc Home Science (Food and Nutrition) from a recognised institution.
Hope this helps.