Certificate

The certificate course of food and nutrition is available at the BR Ambedkar Open University, Hyderabad. It is a 6 months part-time program.

No 3-month courses can give you complete knowledge on statistics and analytics anywhere in the world.
Its a huge subject and requires at least a year or two to get some knowledge (Way more for complete knowledge). Whereas, about the six sigma black belt training, ISI offers that but is of 6 months duration as of my knowledge.

Hi, Please find the link below:
https://www.shiksha.com/teaching-education/exams/ctet.

Yes, surely, this helps but it depends upon the official authorities.

Migration Certificate will be provided by the College you studied in. Ask them for it and they will give it to you. And yes, you can take admission in CCSU if you have proper Bachelor degree with 50% marks.

Admission started in July and classes have already begun.
Next admission session will begin in July 2019 and the forms will be available from June 2019.

Approach your local IEI office if present or contact them online. Tell them you only have provisional now and that you will be able to give them real marksheet later. They will understand and will allow you to take admission. And you will be able to get your diploma certificate by the end of the passing year.

It shouldn't take much time. Verification happens in person and on the same day. However, contact your local IGNOU center to know about it. Don't wait around or you could lose your admission.

Hi Vaibhav
Yes, it is very much possible. You can apply for both the degree and certificate course.