Hello,

To become a Registered dietician one needs to fall the in the following eligibility criteria.

• Clear class 12th with any stream (Science with Biology is preferred).
• Pursue B.Sc/B.A Nutrition or B.Sc Food Technology.
• Pursue a PG Diploma in Nutrition or an M.Sc. in Food and Nutrition.
• Intern for 6-months and clear the Registered Dietician entrance exam.

After this you will be eligible to appear for the RD exam.

To know about the exam and it's syllabus you can refer this link

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

I hope this information helps you.