I assume general category:
(1). IITB M.tech(RA): Definite call but start learning some networking and linux and C++.
(2). IISC M.tech(research): Definite call so start learning linear algebra, probability theory and C.
(3). IITM: Spot admission chances.
(4). IITKGP: 90% chances of direct admission.
(5). IITD : You will get call.
(6). IITK : You will get call but start preparing for written, 45-50 out of 90 required.
All The Best.