Select the word-pair that best represents a similar relationship to the one expressed in the pair of words given below.

(The words must be considered as meaningful English words and must not be related to each other based on the number of letters/number of consonants/vowels in the word.)

Palate : Mouth

The correct option is Ceiling : Room.

Explanation:

Let us analyze the relationship between the given pair of words:

Palate : Mouth

The palate is the upper surface or roof of the mouth.

Now, let us examine the options to find a pair with the exact same structural/spatial relationship:

1. Rivulet : Dam - A rivulet is a small stream, whereas a dam is a barrier built to stop or restrict the flow of water. This does not represent an upper boundary/roof relationship.
2. Hill : Range - A range is a group or chain of hills/mountains. This represents a part-to-group relationship.
3. Rainbow : Sky - A rainbow appears in the sky, but it is an atmospheric phenomenon, not the upper structural surface or roof of the sky.
4. Ceiling : Room - A ceiling is the upper inner surface or roof of a room. This perfectly matches the relationship expressed in Palate : Mouth.

Therefore, Ceiling : Room is the correct word-pair.