For doctor degree , you should have master degree first just for eligibility .As you have done your graduation in B.Com(with business studies) so after complete your master degree in business administration you have option for doctor degree in DOCTOR OF BUSINESS ADMINISTRATION (DBA). There are lot of universities which offering doctorate degrees with good practical & educational environment .check out link of these universities for more detail -: KIIT University,Birla Institute of Technology and Science, Pilani, LOVELY PROFESSIONAL UNIVERSITY (INDIA'S LARGEST UNIVERSITY)ETC...