Engineering Entrance Exam

There are a lot of good colleges in Gujarat, but your firstly you should try for National Institute of Technology Surat (NIT Surat), altough the cutoff remains high but you might get CSE in specila round. I have mentioned some other colleges as well-

Private-Dhirubhai Ambani Institute of Information and Communication Technology (DA-IICT), Sarvajanik College of Engineering and Technology (SCET), Surat, Charotar University of Science and Technology (CHARUSAT), Anand, Ahmedabad University,  Parul University, Vadodara.

Goverment-Gujarat Technological University (GTU), Ahmedabad, L.D. College of Engineering, Ahmedabad

There are seven colleges that  are providing BTech CSE. First is K IIT School of Computer Engineering. Second is School of Mechanical Engineering. Third is, School of Electrical Engineering. 4th is School of Electronics Engineering.

With the rank of 1774 in OBC NCL categeogy it's quite difficult to get any NIT with B.Arch as your branch.

Few of them including private ones, you can consider are:

• NIT Raipur (some chance)
• National Institute of Technology (NIT) Patna
• National Institute of Technology (NIT) Hamirpur
• School of Planning and Architecture (SPA) Bhopal
• School of Planning and Architecture (SPA) Vijayawada

You may considr other private colleges provinding B.Arch as a course.

In JET for UG agriculture programs, out of these 5 subjects: Agriculture, Biology, Chemistry, Mathematics, and Physics. 

You have to select any three subjetcs, so since you already have knowledge of Physics, Chemistry and Biology. I would suggest you to with thses three subjetcs. 

But keep in mind:

• Sometimes there are courses those have specific subjet requirements, like B.Tech in Food Technology madates students to have studied, physics, chemistry and mathematics. So you can't get this course with PCB.

You should have a pretty good chance in Shiv Nadar University with 96.6 percentile scores in JEE Mains and get a direct interview or an interview based upon their merit-based selection policies, so you can contact them at the admission cell or search their official portal for interviews based on your performance.