B.Arch

Hello Suyog,
I'm giving you the current eligibility conditions for B.Arch through NATA exam and JEE Mains paper 2. I hope that there will be no changes in two years.
For NATA exam:
1) All Admissions to architecture degree course shall be subject to passing of National Aptitude Test in Architecture (NATA) conducted by the Council of Architecture
2) Candidates should have a minimum score of 40% in National Aptitude Test in Architecture (NATA) i.e. at least 80/200, for consideration of admission into first year B.Arch.
3) Candidates should have passed 12th standard or equivalent examination with a minimum aggregate of 50% marks with Mathematics and English as subjects of study.
4) 10+3 Diploma (any stream) recognized by Central/ State Governments with 50% aggregate marks.
For JEE Mains paper 2:
For JEE Mains, I think you should have 75% aggregate marks.
JEE Mains is divided into two papers:
Paper 1: For all undergraduate engineering programs and
Paper 2:n For Architecture and Planning programs
As a B.Arch aspirant, you have two modes to get admission in IITs and other institutions:
If you wish to pursue B.Arch in IIT-Kharagpur or IIT-Roorkee, you need to clear Architecture Aptitude Test (AAT). Students who have secured a rank in JEE Advanced are eligible for AAT. The entrance test will be held only at the seven zonal IITs. In a nutshell, to get admission for B.Arch course in these two institutes, one has to clear Paper 1 (B.Arch/B.Planning) of JEE Mains, JEE Advanced and AAT.
For admission to institutes other than IITs, JEE Main Paper 2 (B.Arch/B.Planning) scores are taken into consideration. Students must note that Paper 2 can be attempted in offline i.e. pen and paper mode only.