Am I eligible for B.Arch in an IIT?

You must clear both JEE Mains and JEE Advanced followed by AAT.

For admission to undergraduate architectural courses, you must clear an entrance. For this, the most popular and best exam is JEE Advanced AAT. JEE Advanced Architecture Aptitude Testis an entrance test for admission in B.Arch courses. AAT exam consists of three sections: Mathematics, Aptitude Test