निम्नलिखित चार अक्षर-समूह किसी न किसी प्रकार से एक समान हैं और इसलिए एक समूह बनाते हैं। वह कौन-सा है जो इस समूह से संबंधित नहीं है?

Choose the pair that is different from the other pairs based on a specific logic.

Based on alphabetical order, three of the following four letter-clusters are alike in a certain way and thus form a group. Which is the one that does not belong to that group? (Note: The odd man out is not based on the number of consonants/vowels or their position in the letter cluster)