(B) The neural system was developed for the first time in the phylum $Cnidaria$ (also known as $Coelenterata$).In these organisms,it consists of a sim

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(B) The neural system was developed for the first time in the phylum $Cnidaria$ (also known as $Coelenterata$).In these organisms,it consists of a simple network of neurons dispersed throughout the body,which helps in coordinating the activities of the organism.