What is the best reference book for science ?

1.	What is the best reference book for science ?
Answer» Srijan Vidya question bank may not be best but it is very nyc book...It has vry short , short , long questions everything....So its ur choice...?? Even #evergreen is better. S.Chand is best as it explain in easy language I think for chemistry s chand is the best one in all .. And for physics Hc Verma and for Biology S Dinesh is the best book according to my point of view ????? I think viva exucation is best as depend on your choice Xam idea or S.Chand

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