Three of the following word pairs are alike as they have the same relationship and hence form a group. Which word pair does NOT belong to that group? (The words must be considered as meaningful English words and must not be grouped based on the number of letters/consonants/vowels.)

Among the given word pairs, three share a certain common relationship. Choose the pair in which the words are differently related.

Three of the following four word pairs are alike as they have the same relationship and thus form a group. Which word pair DOES NOT belong to that group? (The words must be considered as meaningful English words and must not be related to each other based on the number of letters/consonants/vowels.)