1. Permian
  2. Triassic
  3. Cretaceous
  4. Jurassic
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Option 3 : Cretaceous

The Cretaceous Period was the last and longest segment of the Mesozoic Era. It lasted approximately 79 million years, from the minor extinction event that closed the Jurassic Period about 145.5 million years ago to the Cretaceous-Paleogene (K-Pg) extinction event dated at 65.5 million years ago.
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