Answer:
A. Lesser substance in a solution
Explanation:
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<span>let the pair of glasses in each layer in small box= x
and the pair glasses in each layer in large box= x-2
total pair of glasses in large box= 5(x-2)
total pair of glasses in small box= 1x</span>
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Excretory system consists of nephridia as excretory organ which is analogous to kidney.
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