BCA

Hello dear, it is based upon your interest
B.Tech is a tough degree, then B.Sc and BCA. In B.Tech, focus is more on practical. And, B.Tech is a 4 year duration UG course. Fees of B.Tech is also higher as compared to BCA and B.Sc. It is 3 year duration UG course. Here, you learn programming languages and about components of computer and DBMS RDBMS etc. In BCA, much focus is on programming languages like Java c and c+ Python etc.

It is based on basic topics and after entrance test, there is personal interview as well. For further information, you can search it on:
www.amity.edu
Go to the college link.

Yes, you can get admission.

You need to score minimum 50% in class 12th, and then you can take admission for BCA.

In general, Maths is not required as a compulsory subjects for BCA as many universities allow students from commerce and even arts to do BCA. But, one more thing you need to be careful about is, if you want to pursue MCA, because for some university, for doing BCA, Maths is not compulsory in +2, but for doing MCA, you should have Maths as a subject in +2.

Hello Pankaj,The link below gives you a list of top ranking BCA colleges in India :
https://www.shiksha.com/it-software/ranking/top-bca-colleges-in-india/96-2-0-0-0.

Yes, you just need the basic knowledge of computer as well as a good maths and you need to prepare for the entrance exams accordingly so that you can get admission in the BCA course.

Hi,
There are many colleges which you may approach as they are good:
IIS University
Apex Institute of Management and Science
Jagannath University
Jaipur National University
BITS Jaipur
NIMS, Jaipur
UEM, Jaipur
AMITY, Jaipur