is ncert is sufficient for B.TECH(architech)
First of all there is no B.Tech Architecture. It is B.Architecture. You have to write JEE Main Paper 2 for this or NATA. See just doing NCERT wont help unless you check out some sample papers and see how the questions are set. Check the sample papers for JEE Main paper 2 and NATA. See how the problems are asked and then prepare accordingly.

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