At what time did the dinosaurs become extinct from the Earth (in $mya$)?

The following chart represents the evolutionary history of vertebrates through geological periods. What are the organisms $P$ and $Q$?

Select the option that shows the correct chronological order of geological eras.

Evolutionary history of an organism is known as

Which era is considered the $ \text{Golden Age of Dinosaurs} $?

The dinosaurs were at their peak during which period?