this is best of identifying of aadhar card best proof of other state .so there are no issue of telengana to prof 

These days Aadhar card is the best proof that can be provided.There is no issue even if you don't have the proof for Telanga.

Hello Anand, You can have domicile certificate of telengana. Usually college clarify the required document in their official site. Now a days college do demand domicile certificate... All the best