Since there is only one option for BSNL lets fill in the choices so we can decide better
Andaman
Assam
Bihar
Chattisgarh
Gujrat
Himachal
Jammu Kashmir
Jharkhand
Karnataka
Kerala
Maharashtra
Northern Region
North east 1
NOrth east 2
Orissa
Punjab
Tamil Nadu
Uttar Pradesh
Uttaranchal
West bengal
Chennai Telecom