What is the name given to a dinosaur known for having three horns?

The name given to the dinosaur known for having three horns is Triceratops. This dinosaur, which lived during the late Cretaceous period, is characterized by its large bony frill and three distinct facial horns: two above the eyes and one on the nose. These features make Triceratops one of the most recognizable dinosaurs. It belonged to the ceratopsid family, which indicates a group of herbivorous dinosaurs with similar horned and frilled anatomy.

In contrast, the other options do not display this distinctive horned feature. Stegosaurus is famous for its plates on its back and spiked tail, Tyrannosaurus Rex is well-known for its massive size and powerful jaws, and Velociraptor is recognized for its agility and sickle-shaped claws. None of these dinosaurs have the three-horned characteristic that defines Triceratops.