Information Technology

No, for B.Tech in IT, Maths is compulsory up to class 12th.

No, you cannot. Eligibility and Selection Procedure for BCA in Bundelkhand University is to pass 10+2 Science with Maths with 45% marks.
Selection Process: Merit in Qualifying Exam.

Without filling application form you can not get admission in any college.

Vasavi Degree & PG College
Department of Computer and Information Sciences - University of Hyderabad
JNTU College of Engineering
Osmania University College of Engineering (OUCE)
Vasavi College of Engineering
Sreenidhi Institute of Science & Technology (SNIST)
MVSR Engineering College
Chaitanya Bharathi Institute of Technology.

WBJEE JECA cut off rank and/or a cut off score will be decided by the board, which and will be announced at the time of publication of the result. Visit below link
https://www.google.com/amp/s/www.shiksha.com/it-software/exams/amp/wbjee-jeca/cutoff.

You can go somewhere for industrial training for the desired period, where you will get internship and certificate of the same course. There are so many service provider companies for the training. Thanks.

Yes, definitely, you can pursue B-Tech in IT after doing Diploma in computer Engineering. Actually, it is best to continue in same branch but if you know that your interest and future goal lies in It then it is great to pursue that.
Institutions that offer best quality engineering courses are:-
BITS Pilani
Delhi College of Engineering
lovely professional university
National Institute of Engineering, Mysore
BIT Ranchi

Hello,
You have obtained a reasonable rank. I think you should get the branch and college of your choice. However, to help you I am attaching a link that will predict college for you:
https://www.shiksha.com/b-tech/resources/upsee-college-predictor.