Which land reptiles were present $200$ million years ago?

Trilobites were evolved during which of the following periods?

The dinosaurs were at their peak during which period?

Match the following geological eras in Column $A$ with their respective time periods in Column $B$ and key evolutionary events in Column $C$. Which of the following is the correct match?

Column $A$	Column $B$ and $C$
$i$. Cenozoic	$2-65 \ \text{mya}$,Origin of vertebrates
$ii$. Palaeozoic	$500-165 \ \text{mya}$,Rise of egg-laying mammals
$iii$. Mesozoic	$135-225 \ \text{mya}$,Reptiles dominant
$iv$. Proterozoic	$350-500 \ \text{mya}$,Trilobites dominant

Identify the plants that are dominant during the Jurassic period.

Which ancestor is present in the ancestral lineage of $Triceratops$?