Ph.D

For admission in Ph.D civil, you need to apply to the institute and thereafter you will be called for an admission test.

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.