courses to become a Dietitian

Yes Latika,
You are definitely eligible for the dietician course. As you have already done your graduation from B.Com, now you can surely opt for any other course.

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Yes, you can pursue a dietitian and nutrition course via distance mode. To be sure that you get a valid certificate, you should check college accreditation before proceeding to study in that particular college.
Colleges offering B.Sc in Nutrition Science in Distance Learning:
1. Madurai Kamaraj Univer

Hi,
Pursuing a course from a recognised university will be better.
You can do correspondence course from IGNOU

To do the Bachelors programme in nutrition and dietetics, one should have completed intermediate in Science with physics, chemistry and biology. The B.Sc. (Food Science and Nutrition) is a 3-year programme. You may not be eligible to pursue a B.Sc. Course in nutrition and dietetics.
What it takes to

To pursue Bachelors in dietitian, you need to have science with physics, chemistry, and biology.