Calicut

Hello Ramya,
Diploma courses are skill oriented. Hence normally distance education dies not help as lots of practicals are involved. I, therefore, feel that there would be hardly any Institute for distance in diploma.

Dear Kamaludheen,
Across India, for the preparation of CAT and MAT entrance examinations, TIMES, IMS and Career Launcher are the best options. Kindly join any of the above-mentioned coaching institutes.
All the best.

I would suggest you to join TIME or IMS as they have a pan India presence and have a good question bank of mock papers and help you with the preparation for GDPI process also.

TIME is the best institute in the country for the preparation of MAT, CAT, and CMAT exam. Their study material is the best. They have good and experienced faculty.