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I don't know about colleges in Rajasthan but I would suggest Chandigarh University because it offers a cucet exam by which you can get a scholarship of up to 100%. A five-year, full-time undergraduate programme leading to the degree of "Bachelor of Architecture" is available. For candidates to acquire the art of designing, planning, and building physical structures of various types, the course combines theoretical and practical expertise. Bachelor of Architecture programmes are offered by numerous prestigious Indian universities. I would suggest Chandigarh University because it has 100% placements
For Chandigarh University students, the 2018-19 placement season was a dream come true, with over 627 top multinational corporations making 6314 INR offers to students.31.77 LPA is the most expensive package available. INFRASTRUCTURE: (Amazon, Microsoft, SAP Labs, VMWare, HP, Deloitte, Cognizant, Sapient, Hitachi, Practo Technologies, Flipkart, Gwynniebee India, and Zomato). .

Your Merit score comes out to be too low to get admission in JJ College of architecture. But don't disappoint I have a solution for it. I recommend you chandigarh university for pursuing B.Arch courses. Why I suggest you chandigarh university because This university is NAAC A+ university and its overall NIRF ranking is 29. It is the best private university in punjab which has skilled faculties, well equipped labs and this university also provide scholarship in various norms. Architecture program of this university are ranked 6 among all private university of India. This university also provide education both in regular and distance mode. You can get more info from following link
https://www.cuchd.in/architecture-and-design/

Yes you can get admission in sir jj college but the thing is we need to know about cut and seats. If you have made the cutoff then of course you can get admission in SIR JJ College Architecture. But if you somehow fail to get into this college then I can suggest you an alternative which is Chandigarh UNIVERSITY. Chandigarh University has a separate department of architecture course. It has a separate building where students go with their practical or project work. With doctorate faculty members gave knowledge. Chandigarh University is famous for its academic work and internship. So if you happen to not get admission in sir jj college you can prefer Chandigarh University. I hope it will help you.