Information Technology

No, I am sending you a link. Please read it. BCA stands for Bachelor in Computer Application
link-https://www.shiksha.com/bca-bachelor-of-computer-applications-chp.

I am sending you an authentic link from where you get a list of all good colleges for BCA in Bihar. Please check it out. link-https://www.shiksha.com/it-software/colleges/bca-colleges-Bihar?st[]=103&bc[]=33&ed[]=et_20&rf=filters&ct[]=171&uaf[]=city
But In my opinion, Any Colleges of Patna university will be the Best.

As much as I can understand your question, you are going to pursue 12th this year and apart from BCA, you want suggestions to pursue other courses.
Well I myself is a student of MAKAUT and pursuing BSC in Media Science.
There are plenty of courses to apply for, since your background is Biology, you can go for BSC in Physiotherapy, BAMS, BUMS, BHMS, travel and tourism course, media, fashion designing etc.
Plenty of field is open for you, I'd suggest go where you feel you can do it well.

The following Colleges in Pune offering the B.Tech IT as under.
1. Dy. Patil College of Engineering Pune
2. Pune Institute of Computer Technology
3. Bharati Vidyapeeth (Deemed to be University) College of Engineering, Pune
4. Pimpri Chinchwad College of Engineering
5. SIT Pune.

If you are asking about B.Tech lateral admission in Information Technology, than there are various colleges are offering B.Tech lateral admission. Few of them are given below.
1. Delhi Technological University, Delhi
2. IKGPUT Jalandhar
3. LPU Jalandhar
4. Thapar Institute of Engineering and Technology, Patiala
5. GGSIPU, Delhi
6. Engineering Colleges of Maharashtra (Direct 2nd year admission through DTE Maharashtra). .

Yes, you can get admission for BCA with 54% in 10+2. You should have any of these: (Maths/ Computer Sc./ Information Practice/ Computer Applications/ Multimedia & Web Technology/ Data Management Application/ Web Application) a optional subject in your 10+2 to be eligible for taking admission.

In my opinion, It's Better to do MCA course after BCA. As Any certification course is not going to help you a lot after BCA. So I suggest you prepare for the NIMCET exam along with Your BCA. By the NIMCET Entrance exam, you get into Top 10 NIT's college for the MCA course. I share you a link of the NIMCET exam From where you get all information about it. Link-www.nimcet.in.