Hello Mohammed!!

For admission, you should have necessarily passed  your Class 12 with Physics, Chemistry, and Mathematics as core subjects with at least 50% as average . And 50% in each of these subjects in the examination.And if you got marks around 250 and above you will be placed in good B arch colleges.Not only examination marks matters , if you scored well in your board examinations (like approx.90% and above) and also in B Arch examination (like 200-220) then you may get rank below 3000,where you will be placed in top B arch colleges . In B Arch all the top SPAs and NITs close their rank at 3000.If you want to get in to SPA Delhi then you will need an AIR below 800.

Hope this information helps you.

All the best.