Hello Sundari,
With a rank of 21008 in AEEE it might not be possible for you to get into a campus of Amrita School of Engineering with any branch. The closing rank for mechanical is usually around 3k in Coimbatore, 5k in Bangalore and 6k in Amritapuri branch for other state candidates. For home state too the closing rank is often around 17-19k. So it is not possible for you, unfortunately, to get a seat in any branch in Amrita.
I hope this helps.
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