I want to PGD in Business Administration, please suggest me UGC/DEC approved university.

You can contact IMSR (27832290/91) they are educational counselor of UGC/DEC approved universities.

M S University

Mahatma Gandhi Universirt

Sikkim Manipal

Vinayaka Missions University

You can check UGC / DEC websites for below university status and availability of the course :

Mahatma Gandhi University

Vinayka Missions University

M S University

Shobhit University

Welingkar,MS University ,Symboisis are good options.