HELLO RAJ
If im not wrong you are talking about VGN Chinmaya Vidyalaya School, Avadi which is situated in tamil nadu> this is a private unaided school affiated to cbse and co-ed.
The classes are from LKG(LOWER KINDERGARTEN) to class 10th.
you can refer this link https://school.careers360.com/schools/vgn-chinmaya-vidyalaya-avadi
HOPE IT HELPS!!
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