निम्नलिखित चार शब्दों में से तीन किसी न किसी रूप में संबंधित हैं, जबकि एक भिन्न है। उस शब्द का चयन करें जो दूसरों के साथ मेल नहीं खाता।

Based on the English alphabetical order, three of the following four letter-clusters are alike in a certain way and form a group. Which one does not belong to that 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 letter-cluster pair 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.)