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(A) Insects belong to the Phylum $Arthropoda$. The most distinct and diagnostic characteristic of $Arthropoda$ is the presence of jointed appendages (

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Body with jointed legs

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(A) Insects belong to the Phylum $Arthropoda$. The most distinct and diagnostic characteristic of $Arthropoda$ is the presence of jointed appendages (jointed legs).Earthworms belong to the Phylum $Annelida$,which are characterized by a segmented,cylindrical body but lack jointed legs.Bilateral symmetry is found in both $Arthropoda$ and $Annelida$,so it cannot be used to distinguish them.Therefore,the presence of jointed legs confirms that the animal is an insect.

Column $(A)$	Column $(B)$
$(a)$ Pore bearing animals	$(A)$ Arthropoda
$(b)$ Diploblastic	$(B)$ Coelenterata
$(c)$ Metameric segmentation	$(C)$ Porifera
$(d)$ Jointed legs	$(D)$ Echinodermata
$(e)$ Soft bodied animals	$(E)$ Mollusca
$(f)$ Spiny skinned animals	$(F)$ Annelida

Sehai and Sidak observed an animal in their garden. Sehai called it an insect while Sidak said it was an earthworm. Choose the character from the following which confirms that it is an insect.

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