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Subject :NSO    Class : Class 7

Besides the arrangement as shown in the given set-up, what other arrangements must be made to test for the presence of starch in the leaves X and Y ?

A The plant should be destarched first and then used for the experiment.
B The plant should be placed in continuous light for 2-3 days prior to experiment..
C On leaf Y, iodine solution should be put on while leaf X should be used as control without iodine application.
D None of these.

please provide an explanation of this answer

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