Select the option in which the words share the same relationship as that shared by the given pair of words.

Sheep : Ram

Given: Sheep : Ram

​A Ram is the male counterpart of a Sheep.

The relationship is female animal → male counterpart.

Now, we check each options.

Option (a): Wolf : Howl (Incorrect)​

This is an animal and its sound, not a male-female relationship.

Option (b): Deer : Stag (Correct)​

A Stag is the male counterpart of a Deer.

Option (c): Cow : Calf (Incorrect)​

A Calf is the young one of a Cow, not the male counterpart.

Option (d): Lion : Cub (Incorrect)​

A Cub is the young one of a Lion, not the male counterpart.

Thus, correct option is (b).