Ph.D

Hello Krishna,
Its nice to know your desire to resume studies after 18 years. Its very creditable. First you have to decide on the university from which you want to do research. Then you may have to appear for entrance exam for acceptance of your candidature for PhD. Once this is done then you can search for a suitable guide and begin!!

Hello Rajender, Of course you can. You have done MBA from a recognised University and its good across India. You will have to follow rules for registration of Ph.D. as declared by the University where you intend to pursue your research.

CUSAT CAT Syllabus and Exam Pattern is mentioned at the link provided below:
https://www.shiksha.com/b-tech/articles/cusat-cat-2016-syllabus-and-pattern-blogId-12099.

Dear Paramita,
You are qualified to do your Ph.D but not quite strong academically. However in USA, there are many options. You have to write to the universities yourself. Visit the department pages, check the Ph.D. information and email the research supervisors. Submit some work if you have, you will also require a strong recommendation network.

Yes you can get admission in any college.

Distance MBA all three are institutions are its best and I would suggest Manipal Sikkim Distance Education it is the best place to learn and the quality of education is emphasized in this institution. I wish you to go ahead and pursue your higher studies their. Or Symbiosis is also growing institutions and has a lot of value when compared to other colleges in India. Ph.D. in direct after distance MBA is a very choice. Before getting admitted to any institution do some research on the affiliation part. UGC needs to recognize the distance course in order to be eligible for regular Ph.D.
All the best.

I will suggest you for GATE exam. If in this you score very good, then your chances of getting a seat in the college like IIT IIIT etc. will increase. Also, many institute may conduct their own exam or they take admission on the basis of your past academics. GATE exam is a common gateway. But, many institute announced their own admission procedure. Mostly college will take admission on the basis of your Masters. But in government you need to qualify one national exam or your academics should be so good that you can even apply direct.

Hello Bhaskar, Your query is really interesting. But unfortunately no survey or ranking appears to have been done for best institute to do research. However, all is not lost. Ranking is available for best civil engineering college. By analogy, we can perhaps say that these colleges will be best for research too!
I am attaching a link that will give you all the required information. https://www.shiksha.com/b-tech/ranking/top-civil-engineering-colleges-in-india/53-2-0-0-0.