how to do b.arch from iit and what is the last date to get application form for it.and from where i can get it's form?

First u need to get through IIT JEE with certain rank, then

Candidates called for counselling and desirous of joining the B.Arch. and B.Des. courses will be required to qualify in an Aptitude Test to be conducted at each counselling institute on June 21, 2008. The test will consist of two papers, each of two hours duration – from 10.00 a.m. to 12.00 noon, and from 2.00 pm to 4:00 pm. Candidates who fail to qualify in the Aptitude Test will not be eligible for admission to either B.Arch. or B.Des. courses. Question papers for aptitude test for B.Arch and B.Des will be in English only

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regards

Ramesh