At the End of Which Era Did Most Dinosaurs and Pterosaurs

Question

At the end of which era did most dinosaurs and pterosaurs become extinct?
A)Cretaceous
B)Permian
C)Devonian
D)Ordovician
E)Triassic

Accepted Answer

The mass extinction event that occurred at the end of the Cretaceous period, approximately 66 million years ago, is widely accepted as the cause of the extinction of most non-avian dinosaurs and pterosaurs.