Most dinosaurs became extinct during which period?

Identify the correct chronological order of the geological eras from the earliest to the most recent.

The first mammals were similar to which of the following?

During which of the following periods did the dinosaurs become extinct?

Match List-$I$ with List-$II$ with respect to the chronology of the evolution of life forms:

List-$I$	List-$II$
$A$. About $500 \text{ mya}$	$I$. Jawless fish probably evolved
$B$. About $350 \text{ mya}$	$C$. Seaweeds and few plants probably existed
$C$. About $320 \text{ mya}$	$III$. Seaweeds and few plants probably existed
$D$. About $65 \text{ mya}$	$IV$. The dinosaurs suddenly disappeared

Choose the correct answer from the options given below:

How many periods are there in the Cenozoic era?