Subject :NSO Class : Class 9
Which of the following statements is/are incorrect?
I Centrifugation method can be used to separate butter from cream.
II Coloured component of blue ink can be separated by evaporation.
III Chromatography can be used to detect drugs in blood.
IV Camphor can be separated from salt by crystallisation.
A II only
B II and III only
C IV only
D II and IV only
I think "a" is the answer.