DG−HK, TW−XA, HK−KQ, GJ−KN -Which is the letter-cluster pair that DOES NOT belong to group?
Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which is the letter-cluster pair that DOES NOT belong to that group? (Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.) […]