Ph.D

Go for Masters in BM from a good college in the field of your interest.

Here is the official link with relevant information:
http://www.iiserpune.ac.in/academics/int-phd-programme

Here is a link that can help you:
http://www.tifr.res.in/~dbs/students/int_phd.html

The duration can be anywhere between 2 and 5 years.

I am listing below do check the list:
Academy of Scientific and Innovative Research
Amity School of Communication, New Delhi Institute of Pharmaceutical Sciences and Research
Faculty of Education - Jamia Millia Islamia University
Indian Institute of Technology Delhi
Indira Gandhi Institute of Physical Education & Sports Sciences
Indira Gandhi National Open University.

Kindly visit this link:
http://www.pumba.in/programs/phd.htm

Hi Vaibhav,
Kindly visit the university's website and get in touch with the administrative official.

Kindly contact the university.

Please use Google for this. I didn't understand the relevance of tagging PUMBA for this.

Hello,
Learning at any stage in life is most welcome. It's indeed great that after so many years also you have that spark for studies. These days UGC has prescribed some guidelines to universities as to the procedure for accepting students for PhD programme. Just check with registrar and you will come to know about this. Just follow these steps.
That's all.