Which of following represents correct order of evolution?

A m o e b a \to L e u c o s o l e n i a \to H y d r a \to A s c a r i s

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L e u c o s o l e n i a \to H y d r a \to A m o e b a \to A s c a r i s

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A s c a r i s \to A m o e b a \to L e u c o s o l e n i a \to H y d r a

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None of these

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Solution

The correct option is A $A m o e b a \to L e u c o s o l e n i a \to H y d r a \to A s c a r i s$
Amoeba is unicellular and most simples organism ( phylum protozoa) . Leucosolenia belongs to phylum porifera. Hydra belongs to phylum Cnidaria.And Ascaris belongs to phylum nematoda.
So, the correct option is 'Amoeba $\to$ Leucosolenia $\to$ Hydra $\to$ Ascaris'

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