The first mammals were like ...$A$... Their fossils are small sized. Mammals were ...$B$... and protected their unborn young inside the mother's body
Choose the correct option for $A$ and $B$ to complete the given $NCERT$ statement
$A-$shrews, $B-$viviparous
$A-$monkeys, $B-$viviparous
$A-$monkeys, $B-$oviparious
$A-$shrews, $B-$oviparious
The dinosaurs were maximum during the period of
First dinosaurs and first egg-laying mammals were originated in