Hello,
As the marks are above 90% for Biology and Chemistry, and given A2 instead of A1. Check whether any upgradation occured and A1 is also mentioned in another column. Or else you can contact CBSE through 1800-11-8002 or info.cbse@gov.in
http://cbseresults.nic.in/cbseresults_cms/Public/View.aspx?page=71
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