Differentiate between vertebrates and invertebrates.
A. (i) Vertebrates a) Notochord is present; b) true internal skeleton is present.
(ii) Invertebrates a) Notochord is absent; b) No true internal skeleton is present
B. (i) Vertebrates a) Notochord is absent, b) No true internal skeleton is present
(ii) Invertebrates a) Notochord is present; b) true internal skeleton is present.
C. (i) Vertebrates a) Nerve cord is present; b) true skeleton is present.
(ii) Invertebrates a) Notochord is present, b) No true internal skeleton present.
D. (i) Vertebrates a) Nerve cord is present, b) True internal skeleton present.
ii) Invertebrates a) Notochord is absent, b) True internal skeleton present.

Hint: Vertebrate, likewise called Craniata, any creature of the subphylum Vertebrata, the transcendent subphylum of the phylum Chordata. They have spines, from which they infer their name. The vertebrates are likewise portrayed by a solid framework consisting essentially of respectively matched masses and a focal sensory system halfway encased inside the spine.

Complete answer: Vertebrates have a spine with a spinal line, while invertebrates don't. The variety is uncommonly high among the invertebrates contrasted with vertebrates. Vertebrates are in every case respectively even, while invertebrates could show either bilateral or radial. Vertebrates are normally enormous bodied and move quickly contrasted with invertebrates. Vertebrates have a closed blood system, a very much created mind, either gills or lungs for breath and an unpredictable and refined sensory system, while those are crude in invertebrates. Thus, it worries that vertebrates have numerous specializations to separate the best out of the climate contrasted with invertebrates. In spite of every one of these changes, somebody could draw a point that invertebrates are more versatile because of their effortlessness, while vertebrates don't have great flexibility in the examination as a result of the specialization.
Hence, the correct answer is option A.

Note: Invertebrate, any creature that comes up short on a vertebral column, or spine, rather than the cartilaginous or hard vertebrates. In excess of 90% of all living creature species are invertebrates. Worldwide in dissemination, they incorporate creatures as different as ocean stars, ocean imps, nightcrawlers, wipes, jellyfish, lobsters, crabs, bugs, insects, snails, shellfishes, and squid. Invertebrates are particularly significant as farming bugs, parasites, or specialists for the transmission of parasitic diseases to people and different vertebrates. Invertebrates fill in as nourishment for people and are key components in evolved ways of life that help winged animals, fish, and numerous other vertebrate species.