
Q Which of the following is not a dinosaur?
- A Spinosaurus
- B Parasaurolophus
- C Saurosuchus
C Saurosuchus

Saurosuchus was an ancestor of crocodiles.
Dinosaurs first appeared on Earth in the Late Triassic period (about 230 million years ago), but at that time, large carnivorous reptiles like Saurosuchus were thriving.