Dear Omprakash,

To take admission in B.Arch courses you have to appear in the entrance exams.

To take admission in IITs you have to appear in JEE Main paper I to be eligible for JEE Advanced followed by AAT.

For NITs you can appear in JEE Main paper II

To take admission in your state colleges and private colleges you can appear in NATA exam.

You can also check the top colleges for architecture below

School of Planning and Architecture (SPA), New Delhi

JJ school of Arts and Architecture

IIT Kharagpur

IIT Roorkee

Centre for Environment Planning, Ahmedabad

Guru Nanak Dev University, Amritsar

Good Luck!!