Choose the correct alternative for the given relation.

Nautilus : Fish : : Teal : ?

Which one of the following will come at the place of question mark $(?)$
$25 : 630 :\, : 10 :$ ?

Choose the correct description for the given relation.

Ovary : Uterus : Cervix

Choose the correct alternative for the given relation..

Carnivore : Herbivore

Choose the correct alternative for the given relation.

Ballad : Song

Choose the correct alternative for the given relation.

Orygen : Burn : : Carbon dioxide : ?