Hello Anuradha..
Thanks for contacting Careers360..
There are certain corrections made in NCERT text books in Biology (+12,+11)..
Keeping the necessity in correcting the errors in some topics,the same was completed and circulated for use Some of the areas of connection are (1)Topic is Biomolecules and page number is 145 ,(2)in mineral nutrition in page number 202,(3) Structural organisation of animals in 109,and in 128,127,137it is Cells.
The +2 twelve classes textbook corrected topic is Environmental Issues in page 284.
As these were corrected,one who follows NCERT old Book, even in that position he or she need not panic and those who already are using the revised book are in the right topics or they can go for correct solutions as is found in NCERT system.
All the best:)
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