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B
Hydrophis
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C
Trionyx
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D
Testudo
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Solution
The correct option is ASphenodon Sphenodon have been referred to as living fossils, which is a term used for any living species of organisms that appears to be the same as a species only known from fossils and which has no close living relatives.
Tuatara is the common name.
Sphenodon is the last survivor of the reptilian order Rhynchocephalia, which evolved in the early Mesozoic era, about 200 million years ago, but is now survived by only two species, which are found on the islands off the New Zealand coast and in Karori Wildlife Sanctuary, Wellington, New Zealand. In 1895, the country of New Zealand awarded the Sphenodon strict legal protection.