Final answer:
The statement is False. The theropods did not have the largest and most sophisticated brains of any known dinosaurs. It is the ornithischian dinosaurs that had the more complex pelvis and sophisticated brains, similar to that of birds.
Step-by-step explanation:
The statement is False.
Although the theropods were a diverse group of carnivorous dinosaurs, they did not have the largest and most sophisticated brains of any known dinosaurs. Rather, it is the ornithischian dinosaurs that had the more complex pelvis and sophisticated brains, superficially similar to that of birds. It is important to distinguish between different groups of dinosaurs when making statements about their brain size and complexity.